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1
by brian
clean slate |
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drop table if exists t1,t2,t3;
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CREATE TABLE t1 (S1 INT);
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CREATE TABLE t2 (S1 INT);
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INSERT INTO t1 VALUES (1);
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INSERT INTO t2 VALUES (2);
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SELECT * FROM t1 JOIN t2;
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S1 S1
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1 2
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SELECT * FROM t1 INNER JOIN t2;
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S1 S1
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1 2
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SELECT * from t1 JOIN t2 USING (S1);
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S1
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SELECT * FROM t1 INNER JOIN t2 USING (S1);
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S1
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SELECT * from t1 CROSS JOIN t2;
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S1 S1
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1 2
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SELECT * from t1 LEFT JOIN t2 USING(S1);
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S1
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1
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SELECT * from t1 LEFT JOIN t2 ON(t2.S1=2);
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S1 S1
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1 2
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SELECT * from t1 RIGHT JOIN t2 USING(S1);
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S1
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2
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SELECT * from t1 RIGHT JOIN t2 ON(t1.S1=1);
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S1 S1
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1 2
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drop table t1,t2;
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create table t1 (id int primary key);
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create table t2 (id int);
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insert into t1 values (75);
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insert into t1 values (79);
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insert into t1 values (78);
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insert into t1 values (77);
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replace into t1 values (76);
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replace into t1 values (76);
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insert into t1 values (104);
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insert into t1 values (103);
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insert into t1 values (102);
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insert into t1 values (101);
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insert into t1 values (105);
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insert into t1 values (106);
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insert into t1 values (107);
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insert into t2 values (107),(75),(1000);
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select t1.id, t2.id from t1, t2 where t2.id = t1.id;
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id id
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107 107
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75 75
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select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t1.id;
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id count(t2.id)
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75 1
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107 1
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select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t2.id;
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id count(t2.id)
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75 1
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107 1
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select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
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id id
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NULL 75
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explain select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY NULL NULL NULL 1 Impossible ON condition
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
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explain select t1.id, t2.id from t1, t2 where t2.id = t1.id and t1.id <0 and t1.id > 0;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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drop table t1,t2;
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CREATE TABLE t1 (
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id int(11) NOT NULL auto_increment,
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token varchar(100) DEFAULT '' NOT NULL,
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count int(11) DEFAULT '0' NOT NULL,
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qty int(11),
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phone char(1) DEFAULT '' NOT NULL,
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timestamp datetime DEFAULT '0000-00-00 00:00:00' NOT NULL,
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PRIMARY KEY (id),
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KEY token (token(15)),
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KEY timestamp (timestamp),
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UNIQUE token_2 (token(75),count,phone)
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);
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INSERT INTO t1 VALUES (21,'e45703b64de71482360de8fec94c3ade',3,7800,'n','1999-12-23 17:22:21');
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INSERT INTO t1 VALUES (22,'e45703b64de71482360de8fec94c3ade',4,5000,'y','1999-12-23 17:22:21');
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INSERT INTO t1 VALUES (18,'346d1cb63c89285b2351f0ca4de40eda',3,13200,'b','1999-12-23 11:58:04');
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INSERT INTO t1 VALUES (17,'ca6ddeb689e1b48a04146b1b5b6f936a',4,15000,'b','1999-12-23 11:36:53');
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INSERT INTO t1 VALUES (16,'ca6ddeb689e1b48a04146b1b5b6f936a',3,13200,'b','1999-12-23 11:36:53');
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INSERT INTO t1 VALUES (26,'a71250b7ed780f6ef3185bfffe027983',5,1500,'b','1999-12-27 09:44:24');
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INSERT INTO t1 VALUES (24,'4d75906f3c37ecff478a1eb56637aa09',3,5400,'y','1999-12-23 17:29:12');
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90 |
INSERT INTO t1 VALUES (25,'4d75906f3c37ecff478a1eb56637aa09',4,6500,'y','1999-12-23 17:29:12');
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INSERT INTO t1 VALUES (27,'a71250b7ed780f6ef3185bfffe027983',3,6200,'b','1999-12-27 09:44:24');
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INSERT INTO t1 VALUES (28,'a71250b7ed780f6ef3185bfffe027983',3,5400,'y','1999-12-27 09:44:36');
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INSERT INTO t1 VALUES (29,'a71250b7ed780f6ef3185bfffe027983',4,17700,'b','1999-12-27 09:45:05');
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CREATE TABLE t2 (
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id int(11) NOT NULL auto_increment,
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category int(11) DEFAULT '0' NOT NULL,
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county int(11) DEFAULT '0' NOT NULL,
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state int(11) DEFAULT '0' NOT NULL,
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phones int(11) DEFAULT '0' NOT NULL,
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nophones int(11) DEFAULT '0' NOT NULL,
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PRIMARY KEY (id),
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KEY category (category,county,state)
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);
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INSERT INTO t2 VALUES (3,2,11,12,5400,7800);
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INSERT INTO t2 VALUES (4,2,25,12,6500,11200);
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106 |
INSERT INTO t2 VALUES (5,1,37,6,10000,12000);
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107 |
select a.id, b.category as catid, b.state as stateid, b.county as countyid from t1 a, t2 b ignore index (primary) where (a.token ='a71250b7ed780f6ef3185bfffe027983') and (a.count = b.id);
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id catid stateid countyid
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27 2 12 11
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28 2 12 11
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29 2 12 25
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26 1 6 37
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select a.id, b.category as catid, b.state as stateid, b.county as
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countyid from t1 a, t2 b where (a.token =
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'a71250b7ed780f6ef3185bfffe027983') and (a.count = b.id) order by a.id;
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id catid stateid countyid
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26 1 6 37
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27 2 12 11
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28 2 12 11
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29 2 12 25
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drop table t1, t2;
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create table t1 (a int primary key);
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insert into t1 values(1),(2);
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select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
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125 |
a
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1
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127 |
2
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128 |
select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a);
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ERROR HY000: Too many tables; MySQL can only use XX tables in a join
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select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
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a
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1
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2
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134 |
select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a);
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135 |
ERROR HY000: Too many tables; MySQL can only use XX tables in a join
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136 |
drop table t1;
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CREATE TABLE t1 (
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a int(11) NOT NULL,
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b int(11) NOT NULL,
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PRIMARY KEY (a,b)
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) ENGINE=MyISAM;
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142 |
INSERT INTO t1 VALUES (1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(2,3);
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143 |
CREATE TABLE t2 (
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a int(11) default NULL
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) ENGINE=MyISAM;
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INSERT INTO t2 VALUES (2),(3);
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SELECT t1.a,t2.a,b FROM t1,t2 WHERE t1.a=t2.a AND (t1.a=1 OR t1.a=2) AND b>=1 AND b<=3;
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a a b
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2 2 3
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150 |
DROP TABLE t1, t2;
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151 |
CREATE TABLE t1 (d DATE NOT NULL);
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152 |
CREATE TABLE t2 (d DATE NOT NULL);
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153 |
INSERT INTO t1 (d) VALUES ('2001-08-01'),('0000-00-00');
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SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE t2.d IS NULL;
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155 |
d
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156 |
2001-08-01
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157 |
0000-00-00
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158 |
SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE d IS NULL;
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159 |
d
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160 |
0000-00-00
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SELECT * from t1 WHERE t1.d IS NULL;
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162 |
d
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163 |
0000-00-00
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164 |
SELECT * FROM t1 WHERE 1/0 IS NULL;
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165 |
d
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166 |
2001-08-01
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167 |
0000-00-00
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168 |
DROP TABLE t1,t2;
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169 |
CREATE TABLE t1 (
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170 |
Document_ID varchar(50) NOT NULL default '',
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171 |
Contractor_ID varchar(6) NOT NULL default '',
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172 |
Language_ID char(3) NOT NULL default '',
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173 |
Expiration_Date datetime default NULL,
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174 |
Publishing_Date datetime default NULL,
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175 |
Title text,
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176 |
Column_ID varchar(50) NOT NULL default '',
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177 |
PRIMARY KEY (Language_ID,Document_ID,Contractor_ID)
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);
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179 |
INSERT INTO t1 VALUES ('xep80','1','ger','2001-12-31 20:00:00','2001-11-12 10:58:00','Kartenbestellung - jetzt auch online','anle'),('','999998','',NULL,NULL,NULL,'');
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180 |
CREATE TABLE t2 (
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181 |
Contractor_ID char(6) NOT NULL default '',
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182 |
Language_ID char(3) NOT NULL default '',
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183 |
Document_ID char(50) NOT NULL default '',
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184 |
CanRead char(1) default NULL,
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185 |
Customer_ID int(11) NOT NULL default '0',
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186 |
PRIMARY KEY (Contractor_ID,Language_ID,Document_ID,Customer_ID)
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187 |
);
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188 |
INSERT INTO t2 VALUES ('5','ger','xep80','1',999999),('1','ger','xep80','1',999999);
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189 |
CREATE TABLE t3 (
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190 |
Language_ID char(3) NOT NULL default '',
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191 |
Column_ID char(50) NOT NULL default '',
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192 |
Contractor_ID char(6) NOT NULL default '',
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193 |
CanRead char(1) default NULL,
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194 |
Active char(1) default NULL,
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195 |
PRIMARY KEY (Language_ID,Column_ID,Contractor_ID)
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196 |
);
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197 |
INSERT INTO t3 VALUES ('ger','home','1','1','1'),('ger','Test','1','0','0'),('ger','derclu','1','0','0'),('ger','clubne','1','0','0'),('ger','philos','1','0','0'),('ger','clubko','1','0','0'),('ger','clubim','1','1','1'),('ger','progra','1','0','0'),('ger','progvo','1','0','0'),('ger','progsp','1','0','0'),('ger','progau','1','0','0'),('ger','progku','1','0','0'),('ger','progss','1','0','0'),('ger','nachl','1','0','0'),('ger','mitgli','1','0','0'),('ger','mitsu','1','0','0'),('ger','mitbus','1','0','0'),('ger','ergmar','1','1','1'),('ger','home','4','1','1'),('ger','derclu','4','1','1'),('ger','clubne','4','0','0'),('ger','philos','4','1','1'),('ger','clubko','4','1','1'),('ger','clubim','4','1','1'),('ger','progra','4','1','1'),('ger','progvo','4','1','1'),('ger','progsp','4','1','1'),('ger','progau','4','0','0'),('ger','progku','4','1','1'),('ger','progss','4','1','1'),('ger','nachl','4','1','1'),('ger','mitgli','4','0','0'),('ger','mitsu','4','0','0'),('ger','mitbus','4','0','0'),('ger','ergmar','4','1','1'),('ger','progra2','1','0','0'),('ger','archiv','4','1','1'),('ger','anmeld','4','1','1'),('ger','thema','4','1','1'),('ger','edito','4','1','1'),('ger','madis','4','1','1'),('ger','enma','4','1','1'),('ger','madis','1','1','1'),('ger','enma','1','1','1'),('ger','vorsch','4','0','0'),('ger','veranst','4','0','0'),('ger','anle','4','1','1'),('ger','redak','4','1','1'),('ger','nele','4','1','1'),('ger','aukt','4','1','1'),('ger','callcenter','4','1','1'),('ger','anle','1','0','0');
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198 |
delete from t1 where Contractor_ID='999998';
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199 |
insert into t1 (Contractor_ID) Values ('999998');
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200 |
SELECT DISTINCT COUNT(t1.Title) FROM t1,
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201 |
t2, t3 WHERE
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202 |
t1.Document_ID='xep80' AND t1.Contractor_ID='1' AND
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203 |
t1.Language_ID='ger' AND '2001-12-21 23:14:24' >=
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204 |
Publishing_Date AND '2001-12-21 23:14:24' <= Expiration_Date AND
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205 |
t1.Document_ID = t2.Document_ID AND
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206 |
t1.Language_ID = t2.Language_ID AND
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207 |
t1.Contractor_ID = t2.Contractor_ID AND (
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208 |
t2.Customer_ID = '4' OR
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209 |
t2.Customer_ID = '999999' OR
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210 |
t2.Customer_ID = '1' )AND t2.CanRead
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211 |
= '1' AND t1.Column_ID=t3.Column_ID AND
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212 |
t1.Language_ID=t3.Language_ID AND (
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213 |
t3.Contractor_ID = '4' OR
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214 |
t3.Contractor_ID = '999999' OR
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215 |
t3.Contractor_ID = '1') AND
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216 |
t3.CanRead='1' AND t3.Active='1';
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217 |
COUNT(t1.Title)
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218 |
1
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219 |
SELECT DISTINCT COUNT(t1.Title) FROM t1,
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220 |
t2, t3 WHERE
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221 |
t1.Document_ID='xep80' AND t1.Contractor_ID='1' AND
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|
222 |
t1.Language_ID='ger' AND '2001-12-21 23:14:24' >=
|
|
223 |
Publishing_Date AND '2001-12-21 23:14:24' <= Expiration_Date AND
|
|
224 |
t1.Document_ID = t2.Document_ID AND
|
|
225 |
t1.Language_ID = t2.Language_ID AND
|
|
226 |
t1.Contractor_ID = t2.Contractor_ID AND (
|
|
227 |
t2.Customer_ID = '4' OR
|
|
228 |
t2.Customer_ID = '999999' OR
|
|
229 |
t2.Customer_ID = '1' )AND t2.CanRead
|
|
230 |
= '1' AND t1.Column_ID=t3.Column_ID AND
|
|
231 |
t1.Language_ID=t3.Language_ID AND (
|
|
232 |
t3.Contractor_ID = '4' OR
|
|
233 |
t3.Contractor_ID = '999999' OR
|
|
234 |
t3.Contractor_ID = '1') AND
|
|
235 |
t3.CanRead='1' AND t3.Active='1';
|
|
236 |
COUNT(t1.Title)
|
|
237 |
1
|
|
238 |
drop table t1,t2,t3;
|
|
239 |
CREATE TABLE t1 (
|
|
240 |
t1_id int(11) default NULL,
|
|
241 |
t2_id int(11) default NULL,
|
|
242 |
type enum('Cost','Percent') default NULL,
|
|
243 |
cost_unit enum('Cost','Unit') default NULL,
|
|
244 |
min_value double default NULL,
|
|
245 |
max_value double default NULL,
|
|
246 |
t3_id int(11) default NULL,
|
|
247 |
item_id int(11) default NULL
|
|
248 |
) ENGINE=MyISAM;
|
|
249 |
INSERT INTO t1 VALUES (12,5,'Percent','Cost',-1,0,-1,-1),(14,4,'Percent','Cost',-1,0,-1,-1),(18,5,'Percent','Cost',-1,0,-1,-1),(19,4,'Percent','Cost',-1,0,-1,-1),(20,5,'Percent','Cost',100,-1,22,291),(21,5,'Percent','Cost',100,-1,18,291),(22,1,'Percent','Cost',100,-1,6,291),(23,1,'Percent','Cost',100,-1,21,291),(24,1,'Percent','Cost',100,-1,9,291),(25,1,'Percent','Cost',100,-1,4,291),(26,1,'Percent','Cost',100,-1,20,291),(27,4,'Percent','Cost',100,-1,7,202),(28,1,'Percent','Cost',50,-1,-1,137),(29,2,'Percent','Cost',100,-1,4,354),(30,2,'Percent','Cost',100,-1,9,137),(93,2,'Cost','Cost',-1,10000000,-1,-1);
|
|
250 |
CREATE TABLE t2 (
|
|
251 |
id int(10) unsigned NOT NULL auto_increment,
|
|
252 |
name varchar(255) default NULL,
|
|
253 |
PRIMARY KEY (id)
|
|
254 |
) ENGINE=MyISAM;
|
|
255 |
INSERT INTO t2 VALUES (1,'s1'),(2,'s2'),(3,'s3'),(4,'s4'),(5,'s5');
|
|
256 |
select t1.*, t2.* from t1, t2 where t2.id=t1.t2_id limit 2;
|
|
257 |
t1_id t2_id type cost_unit min_value max_value t3_id item_id id name
|
|
258 |
22 1 Percent Cost 100 -1 6 291 1 s1
|
|
259 |
23 1 Percent Cost 100 -1 21 291 1 s1
|
|
260 |
drop table t1,t2;
|
|
261 |
CREATE TABLE t1 (
|
|
262 |
siteid varchar(25) NOT NULL default '',
|
|
263 |
emp_id varchar(30) NOT NULL default '',
|
|
264 |
rate_code varchar(10) default NULL,
|
|
265 |
UNIQUE KEY site_emp (siteid,emp_id),
|
|
266 |
KEY siteid (siteid)
|
|
267 |
) ENGINE=MyISAM;
|
|
268 |
INSERT INTO t1 VALUES ('rivercats','psmith','cust'), ('rivercats','KWalker','cust');
|
|
269 |
CREATE TABLE t2 (
|
|
270 |
siteid varchar(25) NOT NULL default '',
|
|
271 |
rate_code varchar(10) NOT NULL default '',
|
|
272 |
base_rate float NOT NULL default '0',
|
|
273 |
PRIMARY KEY (siteid,rate_code)
|
|
274 |
) ENGINE=MyISAM;
|
|
275 |
INSERT INTO t2 VALUES ('rivercats','cust',20);
|
|
276 |
SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND lr.siteid = 'rivercats';
|
|
277 |
rate_code base_rate
|
|
278 |
cust 20
|
|
279 |
SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE lr.siteid = 'rivercats' AND emp.emp_id = 'psmith';
|
|
280 |
rate_code base_rate
|
|
281 |
cust 20
|
|
282 |
SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND siteid = 'rivercats';
|
|
283 |
rate_code base_rate
|
|
284 |
cust 20
|
|
285 |
SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE siteid = 'rivercats' AND emp.emp_id = 'psmith';
|
|
286 |
rate_code base_rate
|
|
287 |
cust 20
|
|
288 |
drop table t1,t2;
|
|
289 |
CREATE TABLE t1 (ID INTEGER NOT NULL PRIMARY KEY, Value1 VARCHAR(255));
|
|
290 |
CREATE TABLE t2 (ID INTEGER NOT NULL PRIMARY KEY, Value2 VARCHAR(255));
|
|
291 |
INSERT INTO t1 VALUES (1, 'A');
|
|
292 |
INSERT INTO t2 VALUES (1, 'B');
|
|
293 |
SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND (Value1 = 'A' AND Value2 <> 'B');
|
|
294 |
ID Value1 Value2
|
|
295 |
SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND Value1 = 'A' AND Value2 <> 'B';
|
|
296 |
ID Value1 Value2
|
|
297 |
SELECT * FROM t1 NATURAL JOIN t2 WHERE (Value1 = 'A' AND Value2 <> 'B') AND 1;
|
|
298 |
ID Value1 Value2
|
|
299 |
drop table t1,t2;
|
|
300 |
CREATE TABLE t1 (a int);
|
|
301 |
CREATE TABLE t2 (b int);
|
|
302 |
CREATE TABLE t3 (c int);
|
|
303 |
SELECT * FROM t1 NATURAL JOIN t2 NATURAL JOIN t3;
|
|
304 |
a b c
|
|
305 |
DROP TABLE t1, t2, t3;
|
|
306 |
create table t1 (i int);
|
|
307 |
create table t2 (i int);
|
|
308 |
create table t3 (i int);
|
|
309 |
insert into t1 values(1),(2);
|
|
310 |
insert into t2 values(2),(3);
|
|
311 |
insert into t3 values (2),(4);
|
|
312 |
select * from t1 natural left join t2;
|
|
313 |
i
|
|
314 |
1
|
|
315 |
2
|
|
316 |
select * from t1 left join t2 on (t1.i=t2.i);
|
|
317 |
i i
|
|
318 |
1 NULL
|
|
319 |
2 2
|
|
320 |
select * from t1 natural left join t2 natural left join t3;
|
|
321 |
i
|
|
322 |
1
|
|
323 |
2
|
|
324 |
select * from t1 left join t2 on (t1.i=t2.i) left join t3 on (t2.i=t3.i);
|
|
325 |
i i i
|
|
326 |
1 NULL NULL
|
|
327 |
2 2 2
|
|
328 |
select * from t3 natural right join t2;
|
|
329 |
i
|
|
330 |
2
|
|
331 |
3
|
|
332 |
select * from t3 right join t2 on (t3.i=t2.i);
|
|
333 |
i i
|
|
334 |
2 2
|
|
335 |
NULL 3
|
|
336 |
select * from t3 natural right join t2 natural right join t1;
|
|
337 |
i
|
|
338 |
1
|
|
339 |
2
|
|
340 |
select * from t3 right join t2 on (t3.i=t2.i) right join t1 on (t2.i=t1.i);
|
|
341 |
i i i
|
|
342 |
NULL NULL 1
|
|
343 |
2 2 2
|
|
344 |
select * from t1,t2 natural left join t3 order by t1.i,t2.i,t3.i;
|
|
345 |
i i
|
|
346 |
1 2
|
|
347 |
1 3
|
|
348 |
2 2
|
|
349 |
2 3
|
|
350 |
select * from t1,t2 left join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
|
|
351 |
i i i
|
|
352 |
1 2 2
|
|
353 |
1 3 NULL
|
|
354 |
2 2 2
|
|
355 |
2 3 NULL
|
|
356 |
select t1.i,t2.i,t3.i from t2 natural left join t3,t1 order by t1.i,t2.i,t3.i;
|
|
357 |
i i i
|
|
358 |
1 2 2
|
|
359 |
1 3 NULL
|
|
360 |
2 2 2
|
|
361 |
2 3 NULL
|
|
362 |
select t1.i,t2.i,t3.i from t2 left join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
|
|
363 |
i i i
|
|
364 |
1 2 2
|
|
365 |
1 3 NULL
|
|
366 |
2 2 2
|
|
367 |
2 3 NULL
|
|
368 |
select * from t1,t2 natural right join t3 order by t1.i,t2.i,t3.i;
|
|
369 |
i i
|
|
370 |
1 4
|
|
371 |
1 2
|
|
372 |
2 4
|
|
373 |
2 2
|
|
374 |
select * from t1,t2 right join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
|
|
375 |
i i i
|
|
376 |
1 NULL 4
|
|
377 |
1 2 2
|
|
378 |
2 NULL 4
|
|
379 |
2 2 2
|
|
380 |
select t1.i,t2.i,t3.i from t2 natural right join t3,t1 order by t1.i,t2.i,t3.i;
|
|
381 |
i i i
|
|
382 |
1 NULL 4
|
|
383 |
1 2 2
|
|
384 |
2 NULL 4
|
|
385 |
2 2 2
|
|
386 |
select t1.i,t2.i,t3.i from t2 right join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
|
|
387 |
i i i
|
|
388 |
1 NULL 4
|
|
389 |
1 2 2
|
|
390 |
2 NULL 4
|
|
391 |
2 2 2
|
|
392 |
drop table t1,t2,t3;
|
|
393 |
CREATE TABLE t1 (a int, b int default 0, c int default 1);
|
|
394 |
INSERT INTO t1 (a) VALUES (1),(2),(3),(4),(5),(6),(7),(8);
|
|
395 |
INSERT INTO t1 (a) SELECT a + 8 FROM t1;
|
|
396 |
INSERT INTO t1 (a) SELECT a + 16 FROM t1;
|
|
397 |
CREATE TABLE t2 (a int, d int, e int default 0);
|
|
398 |
INSERT INTO t2 (a, d) VALUES (1,1),(2,2),(3,3),(4,4);
|
|
399 |
INSERT INTO t2 (a, d) SELECT a+4, a+4 FROM t2;
|
|
400 |
INSERT INTO t2 (a, d) SELECT a+8, a+8 FROM t2;
|
|
401 |
EXPLAIN
|
|
402 |
SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
|
|
403 |
ORDER BY t1.b, t1.c;
|
|
404 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
405 |
1 SIMPLE t1 ALL NULL NULL NULL NULL 32 Using temporary; Using filesort
|
|
406 |
1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer
|
|
407 |
SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
|
|
408 |
ORDER BY t1.b, t1.c;
|
|
409 |
e
|
|
410 |
0
|
|
411 |
0
|
|
412 |
0
|
|
413 |
0
|
|
414 |
0
|
|
415 |
0
|
|
416 |
0
|
|
417 |
0
|
|
418 |
0
|
|
419 |
0
|
|
420 |
0
|
|
421 |
0
|
|
422 |
0
|
|
423 |
0
|
|
424 |
0
|
|
425 |
0
|
|
426 |
0
|
|
427 |
0
|
|
428 |
0
|
|
429 |
0
|
|
430 |
0
|
|
431 |
0
|
|
432 |
0
|
|
433 |
0
|
|
434 |
0
|
|
435 |
0
|
|
436 |
0
|
|
437 |
0
|
|
438 |
0
|
|
439 |
0
|
|
440 |
0
|
|
441 |
0
|
|
442 |
DROP TABLE t1,t2;
|
|
443 |
create table t1 (c int, b int);
|
|
444 |
create table t2 (a int, b int);
|
|
445 |
create table t3 (b int, c int);
|
|
446 |
create table t4 (y int, c int);
|
|
447 |
create table t5 (y int, z int);
|
|
448 |
create table t6 (a int, c int);
|
|
449 |
insert into t1 values (10,1);
|
|
450 |
insert into t1 values (3 ,1);
|
|
451 |
insert into t1 values (3 ,2);
|
|
452 |
insert into t2 values (2, 1);
|
|
453 |
insert into t3 values (1, 3);
|
|
454 |
insert into t3 values (1,10);
|
|
455 |
insert into t4 values (11,3);
|
|
456 |
insert into t4 values (2, 3);
|
|
457 |
insert into t5 values (11,4);
|
|
458 |
insert into t6 values (2, 3);
|
|
459 |
select * from t1 natural join t2;
|
|
460 |
b c a
|
|
461 |
1 10 2
|
|
462 |
1 3 2
|
|
463 |
select * from t1 natural join t2;
|
|
464 |
b c a
|
|
465 |
1 10 2
|
|
466 |
1 3 2
|
|
467 |
select b as a, c as b, a as c from t1 natural join t2;
|
|
468 |
a b c
|
|
469 |
1 10 2
|
|
470 |
1 3 2
|
|
471 |
select a as c, c as b, b as a from t1 natural join t2;
|
|
472 |
c b a
|
|
473 |
2 10 1
|
|
474 |
2 3 1
|
|
475 |
select t1.c, t1.b, t2.a from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c;
|
|
476 |
c b a
|
|
477 |
3 1 2
|
|
478 |
3 2 2
|
|
479 |
select t1.c as b, t1.b as a, t2.a as c
|
|
480 |
from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c;
|
|
481 |
b a c
|
|
482 |
3 1 2
|
|
483 |
3 2 2
|
|
484 |
select * from t1 natural join (t2 natural join t3);
|
|
485 |
c b a
|
|
486 |
10 1 2
|
|
487 |
3 1 2
|
|
488 |
select * from (t1 natural join t2) natural join (t3 natural join t4);
|
|
489 |
b c a y
|
|
490 |
1 3 2 11
|
|
491 |
1 3 2 2
|
|
492 |
select * from (t1 natural join t2) natural left join (t3 natural join t4);
|
|
493 |
b c a y
|
|
494 |
1 10 2 NULL
|
|
495 |
1 3 2 11
|
|
496 |
1 3 2 2
|
|
497 |
select * from (t3 natural join t4) natural right join (t1 natural join t2);
|
|
498 |
b c a y
|
|
499 |
1 10 2 NULL
|
|
500 |
1 3 2 11
|
|
501 |
1 3 2 2
|
|
502 |
select * from (t1 natural left join t2) natural left join (t3 natural left join t4);
|
|
503 |
b c a y
|
|
504 |
1 10 2 NULL
|
|
505 |
1 3 2 11
|
|
506 |
1 3 2 2
|
|
507 |
2 3 NULL NULL
|
|
508 |
select * from (t4 natural right join t3) natural right join (t2 natural right join t1);
|
|
509 |
b c a y
|
|
510 |
1 10 2 NULL
|
|
511 |
1 3 2 11
|
|
512 |
1 3 2 2
|
|
513 |
2 3 NULL NULL
|
|
514 |
select * from t1 natural join t2 natural join t3 natural join t4;
|
|
515 |
c b a y
|
|
516 |
3 1 2 11
|
|
517 |
3 1 2 2
|
|
518 |
select * from ((t1 natural join t2) natural join t3) natural join t4;
|
|
519 |
c b a y
|
|
520 |
3 1 2 11
|
|
521 |
3 1 2 2
|
|
522 |
select * from t1 natural join (t2 natural join (t3 natural join t4));
|
|
523 |
c b a y
|
|
524 |
3 1 2 11
|
|
525 |
3 1 2 2
|
|
526 |
select * from t5 natural right join (t4 natural right join ((t2 natural right join t1) natural right join t3));
|
|
527 |
y c b a z
|
|
528 |
11 3 1 2 4
|
|
529 |
2 3 1 2 NULL
|
|
530 |
NULL 10 1 2 NULL
|
|
531 |
select * from (t1 natural join t2), (t3 natural join t4);
|
|
532 |
b c a c b y
|
|
533 |
1 10 2 3 1 11
|
|
534 |
1 10 2 3 1 2
|
|
535 |
1 3 2 3 1 11
|
|
536 |
1 3 2 3 1 2
|
|
537 |
select * from t5 natural join ((t1 natural join t2), (t3 natural join t4));
|
|
538 |
y z b c a c b
|
|
539 |
11 4 1 10 2 3 1
|
|
540 |
11 4 1 3 2 3 1
|
|
541 |
select * from ((t1 natural join t2), (t3 natural join t4)) natural join t5;
|
|
542 |
y b c a c b z
|
|
543 |
11 1 10 2 3 1 4
|
|
544 |
11 1 3 2 3 1 4
|
|
545 |
select * from t5 natural join ((t1 natural join t2) cross join (t3 natural join t4));
|
|
546 |
y z b c a c b
|
|
547 |
11 4 1 10 2 3 1
|
|
548 |
11 4 1 3 2 3 1
|
|
549 |
select * from ((t1 natural join t2) cross join (t3 natural join t4)) natural join t5;
|
|
550 |
y b c a c b z
|
|
551 |
11 1 10 2 3 1 4
|
|
552 |
11 1 3 2 3 1 4
|
|
553 |
select * from (t1 join t2 using (b)) join (t3 join t4 using (c)) using (c);
|
|
554 |
c b a b y
|
|
555 |
3 1 2 1 11
|
|
556 |
3 1 2 1 2
|
|
557 |
select * from (t1 join t2 using (b)) natural join (t3 join t4 using (c));
|
|
558 |
b c a y
|
|
559 |
1 3 2 11
|
|
560 |
1 3 2 2
|
|
561 |
select a,b,c from (t1 natural join t2) natural join (t3 natural join t4)
|
|
562 |
where b + 1 = y or b + 10 = y group by b,c,a having min(b) < max(y) order by a;
|
|
563 |
a b c
|
|
564 |
2 1 3
|
|
565 |
select * from (t1 natural join t2) natural left join (t3 natural join t4)
|
|
566 |
where b + 1 = y or b + 10 = y group by b,c,a,y having min(b) < max(y) order by a, y;
|
|
567 |
b c a y
|
|
568 |
1 3 2 2
|
|
569 |
1 3 2 11
|
|
570 |
select * from (t3 natural join t4) natural right join (t1 natural join t2)
|
|
571 |
where b + 1 = y or b + 10 = y group by b,c,a,y having min(b) < max(y) order by a, y;
|
|
572 |
b c a y
|
|
573 |
1 3 2 2
|
|
574 |
1 3 2 11
|
|
575 |
select * from t1 natural join t2 where t1.c > t2.a;
|
|
576 |
b c a
|
|
577 |
1 10 2
|
|
578 |
1 3 2
|
|
579 |
select * from t1 natural join t2 where t1.b > t2.b;
|
|
580 |
b c a
|
|
581 |
select * from t1 natural left join (t4 natural join t5) where t5.z is not NULL;
|
|
582 |
c b y z
|
|
583 |
3 1 11 4
|
|
584 |
3 2 11 4
|
|
585 |
select * from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c;
|
|
586 |
c b a b y c
|
|
587 |
3 1 2 1 2 3
|
|
588 |
3 2 2 1 2 3
|
|
589 |
select * from (t2 join t4 on b + 1 = y) join t1 on t1.c = t4.c;
|
|
590 |
a b y c c b
|
|
591 |
2 1 2 3 3 1
|
|
592 |
2 1 2 3 3 2
|
|
593 |
select * from t1 natural join (t2 join t4 on b + 1 = y);
|
|
594 |
c b a y
|
|
595 |
3 1 2 2
|
|
596 |
select * from (t1 cross join t2) join (t3 cross join t4) on (a < y and t2.b < t3.c);
|
|
597 |
c b a b b c y c
|
|
598 |
10 1 2 1 1 3 11 3
|
|
599 |
10 1 2 1 1 10 11 3
|
|
600 |
3 1 2 1 1 3 11 3
|
|
601 |
3 1 2 1 1 10 11 3
|
|
602 |
3 2 2 1 1 3 11 3
|
|
603 |
3 2 2 1 1 10 11 3
|
|
604 |
select * from (t1, t2) join (t3, t4) on (a < y and t2.b < t3.c);
|
|
605 |
c b a b b c y c
|
|
606 |
10 1 2 1 1 3 11 3
|
|
607 |
10 1 2 1 1 10 11 3
|
|
608 |
3 1 2 1 1 3 11 3
|
|
609 |
3 1 2 1 1 10 11 3
|
|
610 |
3 2 2 1 1 3 11 3
|
|
611 |
3 2 2 1 1 10 11 3
|
|
612 |
select * from (t1 natural join t2) join (t3 natural join t4) on a = y;
|
|
613 |
b c a c b y
|
|
614 |
1 10 2 3 1 2
|
|
615 |
1 3 2 3 1 2
|
|
616 |
select * from ((t3 join (t1 join t2 on c > a) on t3.b < t2.a) join t4 on y > t1.c) join t5 on z = t1.b + 3;
|
|
617 |
b c c b a b y c y z
|
|
618 |
1 3 10 1 2 1 11 3 11 4
|
|
619 |
1 10 10 1 2 1 11 3 11 4
|
|
620 |
1 3 3 1 2 1 11 3 11 4
|
|
621 |
1 10 3 1 2 1 11 3 11 4
|
|
622 |
select * from t1 natural join t2 where t1.b > 0;
|
|
623 |
b c a
|
|
624 |
1 10 2
|
|
625 |
1 3 2
|
|
626 |
select * from t1 natural join (t4 natural join t5) where t4.y > 7;
|
|
627 |
c b y z
|
|
628 |
3 1 11 4
|
|
629 |
3 2 11 4
|
|
630 |
select * from (t4 natural join t5) natural join t1 where t4.y > 7;
|
|
631 |
c y z b
|
|
632 |
3 11 4 1
|
|
633 |
3 11 4 2
|
|
634 |
select * from t1 natural left join (t4 natural join t5) where t4.y > 7;
|
|
635 |
c b y z
|
|
636 |
3 1 11 4
|
|
637 |
3 2 11 4
|
|
638 |
select * from (t4 natural join t5) natural right join t1 where t4.y > 7;
|
|
639 |
c b y z
|
|
640 |
3 1 11 4
|
|
641 |
3 2 11 4
|
|
642 |
select * from (t1 natural join t2) join (t3 natural join t4) on t1.b = t3.b;
|
|
643 |
b c a c b y
|
|
644 |
1 10 2 3 1 11
|
|
645 |
1 10 2 3 1 2
|
|
646 |
1 3 2 3 1 11
|
|
647 |
1 3 2 3 1 2
|
|
648 |
select t1.*, t2.* from t1 natural join t2;
|
|
649 |
c b a b
|
|
650 |
10 1 2 1
|
|
651 |
3 1 2 1
|
|
652 |
select t1.*, t2.*, t3.*, t4.* from (t1 natural join t2) natural join (t3 natural join t4);
|
|
653 |
c b a b b c y c
|
|
654 |
3 1 2 1 1 3 11 3
|
|
655 |
3 1 2 1 1 3 2 3
|
|
656 |
select * from (select * from t1 natural join t2) as t12
|
|
657 |
natural join
|
|
658 |
(select * from t3 natural join t4) as t34;
|
|
659 |
b c a y
|
|
660 |
1 3 2 11
|
|
661 |
1 3 2 2
|
|
662 |
select * from (select * from t1 natural join t2) as t12
|
|
663 |
natural left join
|
|
664 |
(select * from t3 natural join t4) as t34;
|
|
665 |
b c a y
|
|
666 |
1 10 2 NULL
|
|
667 |
1 3 2 11
|
|
668 |
1 3 2 2
|
|
669 |
select * from (select * from t3 natural join t4) as t34
|
|
670 |
natural right join
|
|
671 |
(select * from t1 natural join t2) as t12;
|
|
672 |
b c a y
|
|
673 |
1 10 2 NULL
|
|
674 |
1 3 2 11
|
|
675 |
1 3 2 2
|
|
676 |
select * from t1 natural join (t3 cross join t4);
|
|
677 |
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
678 |
select * from (t3 cross join t4) natural join t1;
|
|
679 |
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
680 |
select * from t1 join (t2, t3) using (b);
|
|
681 |
ERROR 23000: Column 'b' in from clause is ambiguous
|
|
682 |
select * from ((t1 natural join t2), (t3 natural join t4)) natural join t6;
|
|
683 |
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
684 |
select * from ((t1 natural join t2), (t3 natural join t4)) natural join t6;
|
|
685 |
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
686 |
select * from t6 natural join ((t1 natural join t2), (t3 natural join t4));
|
|
687 |
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
688 |
select * from (t1 join t2 on t1.b=t2.b) natural join (t3 natural join t4);
|
|
689 |
ERROR 23000: Column 'b' in from clause is ambiguous
|
|
690 |
select * from (t3 natural join t4) natural join (t1 join t2 on t1.b=t2.b);
|
|
691 |
ERROR 23000: Column 'b' in from clause is ambiguous
|
|
692 |
select * from (t3 join (t4 natural join t5) on (b < z))
|
|
693 |
natural join
|
|
694 |
(t1 natural join t2);
|
|
695 |
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
696 |
select * from (t1 natural join t2) natural join (t3 join (t4 natural join t5) on (b < z));
|
|
697 |
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
698 |
drop table t1;
|
|
699 |
drop table t2;
|
|
700 |
drop table t3;
|
|
701 |
drop table t4;
|
|
702 |
drop table t5;
|
|
703 |
drop table t6;
|
|
704 |
create table t1 (a1 int, a2 int);
|
|
705 |
create table t2 (a1 int, b int);
|
|
706 |
create table t3 (c1 int, c2 int);
|
|
707 |
create table t4 (c2 int);
|
|
708 |
insert into t1 values (1,1);
|
|
709 |
insert into t2 values (1,1);
|
|
710 |
insert into t3 values (1,1);
|
|
711 |
insert into t4 values (1);
|
|
712 |
select * from t1 join t2 using (a1) join t3 on b=c1 join t4 using (c2);
|
|
713 |
c2 a1 a2 b c1
|
|
714 |
1 1 1 1 1
|
|
715 |
select * from t3 join (t1 join t2 using (a1)) on b=c1 join t4 using (c2);
|
|
716 |
c2 c1 a1 a2 b
|
|
717 |
1 1 1 1 1
|
|
718 |
select a2 from t1 join t2 using (a1) join t3 on b=c1 join t4 using (c2);
|
|
719 |
a2
|
|
720 |
1
|
|
721 |
select a2 from t3 join (t1 join t2 using (a1)) on b=c1 join t4 using (c2);
|
|
722 |
a2
|
|
723 |
1
|
|
724 |
select a2 from ((t1 join t2 using (a1)) join t3 on b=c1) join t4 using (c2);
|
|
725 |
a2
|
|
726 |
1
|
|
727 |
select a2 from ((t1 natural join t2) join t3 on b=c1) natural join t4;
|
|
728 |
a2
|
|
729 |
1
|
|
730 |
drop table t1,t2,t3,t4;
|
|
731 |
create table t1 (c int, b int);
|
|
732 |
create table t2 (a int, b int);
|
|
733 |
create table t3 (b int, c int);
|
|
734 |
create table t4 (y int, c int);
|
|
735 |
create table t5 (y int, z int);
|
|
736 |
insert into t1 values (3,2);
|
|
737 |
insert into t2 values (1,2);
|
|
738 |
insert into t3 values (2,3);
|
|
739 |
insert into t4 values (1,3);
|
|
740 |
insert into t5 values (1,4);
|
|
741 |
select * from ((t3 natural join (t1 natural join t2)) natural join t4)
|
|
742 |
natural join t5;
|
|
743 |
y c b a z
|
|
744 |
1 3 2 1 4
|
|
745 |
drop table t1, t2, t3, t4, t5;
|
|
746 |
create table t1 (a int, b int);
|
|
747 |
insert into t1 values
|
|
748 |
(NULL, 1),
|
|
749 |
(NULL, 2),
|
|
750 |
(NULL, 3),
|
|
751 |
(NULL, 4);
|
|
752 |
create table t2 (a int not null, primary key(a));
|
|
753 |
insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
754 |
create table t3 (a int not null, primary key(a));
|
|
755 |
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
756 |
flush status;
|
|
757 |
select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
|
|
758 |
a b a a
|
|
759 |
explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
|
|
760 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
761 |
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
|
|
762 |
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index
|
|
763 |
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
|
|
764 |
We expect rnd_next=5, and read_key must be 0 because of short-cutting:
|
|
765 |
show status like 'Handler_read%';
|
|
766 |
Variable_name Value
|
|
767 |
Handler_read_first 0
|
|
768 |
Handler_read_key 0
|
|
769 |
Handler_read_next 0
|
|
770 |
Handler_read_prev 0
|
|
771 |
Handler_read_rnd 0
|
|
772 |
Handler_read_rnd_next 5
|
|
773 |
drop table t1, t2, t3;
|
|
774 |
create table t1 (a int);
|
|
775 |
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
776 |
create table t2 (a int, b int, filler char(100), key(a), key(b));
|
|
777 |
create table t3 (a int, b int, filler char(100), key(a), key(b));
|
|
778 |
insert into t2
|
|
779 |
select @a:= A.a + 10*(B.a + 10*C.a), @a, 'filler' from t1 A, t1 B, t1 C;
|
|
780 |
insert into t3 select * from t2 where a < 800;
|
|
781 |
explain select * from t2,t3 where t2.a < 200 and t2.b=t3.b;
|
|
782 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
783 |
1 SIMPLE t2 ALL a,b NULL NULL NULL 1000 Using where
|
|
784 |
1 SIMPLE t3 ref b b 5 test.t2.b 1
|
|
785 |
drop table t1, t2, t3;
|
|
786 |
create table t1 (a int);
|
|
787 |
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
788 |
create table t2 (a int, b int, primary key(a));
|
|
789 |
insert into t2 select @v:=A.a+10*B.a, @v from t1 A, t1 B;
|
|
790 |
explain select * from t1;
|
|
791 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
792 |
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
|
|
793 |
show status like '%cost%';
|
|
794 |
Variable_name Value
|
|
795 |
Last_query_cost 4.016090
|
|
796 |
select 'The cost of accessing t1 (dont care if it changes' '^';
|
|
797 |
The cost of accessing t1 (dont care if it changes
|
|
798 |
The cost of accessing t1 (dont care if it changes^
|
|
799 |
select 'vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv' Z;
|
|
800 |
Z
|
|
801 |
vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv
|
|
802 |
explain select * from t1, t2 A, t2 B where A.a = t1.a and B.a=A.b;
|
|
803 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
804 |
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
|
|
805 |
1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1
|
|
806 |
1 SIMPLE B eq_ref PRIMARY PRIMARY 4 test.A.b 1
|
|
807 |
show status like '%cost%';
|
|
808 |
Variable_name Value
|
|
809 |
Last_query_cost 24.016090
|
|
810 |
select '^^: The above should be ~= 20 + cost(select * from t1). Value less than 20 is an error' Z;
|
|
811 |
Z
|
|
812 |
^^: The above should be ~= 20 + cost(select * from t1). Value less than 20 is an error
|
|
813 |
drop table t1, t2;
|
|
814 |
CREATE TABLE t1 (a INT PRIMARY KEY, b INT);
|
|
815 |
CREATE TABLE t2 (c INT PRIMARY KEY, d INT);
|
|
816 |
INSERT INTO t1 VALUES(1,NULL),(2,NULL),(3,NULL),(4,NULL);
|
|
817 |
INSERT INTO t1 SELECT a + 4, b FROM t1;
|
|
818 |
INSERT INTO t1 SELECT a + 8, b FROM t1;
|
|
819 |
INSERT INTO t1 SELECT a + 16, b FROM t1;
|
|
820 |
INSERT INTO t1 SELECT a + 32, b FROM t1;
|
|
821 |
INSERT INTO t1 SELECT a + 64, b FROM t1;
|
|
822 |
INSERT INTO t2 SELECT a, b FROM t1;
|
|
823 |
EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2;
|
|
824 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
825 |
1 SIMPLE t1 index NULL PRIMARY 4 NULL 2
|
|
826 |
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1
|
|
827 |
EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2;
|
|
828 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
829 |
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2
|
|
830 |
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1
|
|
831 |
SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2;
|
|
832 |
a b c d
|
|
833 |
SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2;
|
|
834 |
a b c d
|
|
835 |
1 NULL 1 NULL
|
|
836 |
2 NULL 2 NULL
|
|
837 |
EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a;
|
|
838 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
839 |
1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using filesort
|
|
840 |
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1
|
|
841 |
EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a;
|
|
842 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
843 |
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 128 Using filesort
|
|
844 |
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1
|
|
845 |
SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a;
|
|
846 |
a b c d
|
|
847 |
SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a;
|
|
848 |
a b c d
|
|
849 |
1 NULL 1 NULL
|
|
850 |
2 NULL 2 NULL
|
|
851 |
3 NULL 3 NULL
|
|
852 |
4 NULL 4 NULL
|
|
853 |
5 NULL 5 NULL
|
|
854 |
6 NULL 6 NULL
|
|
855 |
7 NULL 7 NULL
|
|
856 |
8 NULL 8 NULL
|
|
857 |
9 NULL 9 NULL
|
|
858 |
10 NULL 10 NULL
|
|
859 |
11 NULL 11 NULL
|
|
860 |
12 NULL 12 NULL
|
|
861 |
13 NULL 13 NULL
|
|
862 |
14 NULL 14 NULL
|
|
863 |
15 NULL 15 NULL
|
|
864 |
16 NULL 16 NULL
|
|
865 |
17 NULL 17 NULL
|
|
866 |
18 NULL 18 NULL
|
|
867 |
19 NULL 19 NULL
|
|
868 |
20 NULL 20 NULL
|
|
869 |
21 NULL 21 NULL
|
|
870 |
22 NULL 22 NULL
|
|
871 |
23 NULL 23 NULL
|
|
872 |
24 NULL 24 NULL
|
|
873 |
25 NULL 25 NULL
|
|
874 |
26 NULL 26 NULL
|
|
875 |
27 NULL 27 NULL
|
|
876 |
28 NULL 28 NULL
|
|
877 |
29 NULL 29 NULL
|
|
878 |
30 NULL 30 NULL
|
|
879 |
31 NULL 31 NULL
|
|
880 |
32 NULL 32 NULL
|
|
881 |
33 NULL 33 NULL
|
|
882 |
34 NULL 34 NULL
|
|
883 |
35 NULL 35 NULL
|
|
884 |
36 NULL 36 NULL
|
|
885 |
37 NULL 37 NULL
|
|
886 |
38 NULL 38 NULL
|
|
887 |
39 NULL 39 NULL
|
|
888 |
40 NULL 40 NULL
|
|
889 |
41 NULL 41 NULL
|
|
890 |
42 NULL 42 NULL
|
|
891 |
43 NULL 43 NULL
|
|
892 |
44 NULL 44 NULL
|
|
893 |
45 NULL 45 NULL
|
|
894 |
46 NULL 46 NULL
|
|
895 |
47 NULL 47 NULL
|
|
896 |
48 NULL 48 NULL
|
|
897 |
49 NULL 49 NULL
|
|
898 |
50 NULL 50 NULL
|
|
899 |
51 NULL 51 NULL
|
|
900 |
52 NULL 52 NULL
|
|
901 |
53 NULL 53 NULL
|
|
902 |
54 NULL 54 NULL
|
|
903 |
55 NULL 55 NULL
|
|
904 |
56 NULL 56 NULL
|
|
905 |
57 NULL 57 NULL
|
|
906 |
58 NULL 58 NULL
|
|
907 |
59 NULL 59 NULL
|
|
908 |
60 NULL 60 NULL
|
|
909 |
61 NULL 61 NULL
|
|
910 |
62 NULL 62 NULL
|
|
911 |
63 NULL 63 NULL
|
|
912 |
64 NULL 64 NULL
|
|
913 |
65 NULL 65 NULL
|
|
914 |
66 NULL 66 NULL
|
|
915 |
67 NULL 67 NULL
|
|
916 |
68 NULL 68 NULL
|
|
917 |
69 NULL 69 NULL
|
|
918 |
70 NULL 70 NULL
|
|
919 |
71 NULL 71 NULL
|
|
920 |
72 NULL 72 NULL
|
|
921 |
73 NULL 73 NULL
|
|
922 |
74 NULL 74 NULL
|
|
923 |
75 NULL 75 NULL
|
|
924 |
76 NULL 76 NULL
|
|
925 |
77 NULL 77 NULL
|
|
926 |
78 NULL 78 NULL
|
|
927 |
79 NULL 79 NULL
|
|
928 |
80 NULL 80 NULL
|
|
929 |
81 NULL 81 NULL
|
|
930 |
82 NULL 82 NULL
|
|
931 |
83 NULL 83 NULL
|
|
932 |
84 NULL 84 NULL
|
|
933 |
85 NULL 85 NULL
|
|
934 |
86 NULL 86 NULL
|
|
935 |
87 NULL 87 NULL
|
|
936 |
88 NULL 88 NULL
|
|
937 |
89 NULL 89 NULL
|
|
938 |
90 NULL 90 NULL
|
|
939 |
91 NULL 91 NULL
|
|
940 |
92 NULL 92 NULL
|
|
941 |
93 NULL 93 NULL
|
|
942 |
94 NULL 94 NULL
|
|
943 |
95 NULL 95 NULL
|
|
944 |
96 NULL 96 NULL
|
|
945 |
97 NULL 97 NULL
|
|
946 |
98 NULL 98 NULL
|
|
947 |
99 NULL 99 NULL
|
|
948 |
100 NULL 100 NULL
|
|
949 |
101 NULL 101 NULL
|
|
950 |
102 NULL 102 NULL
|
|
951 |
103 NULL 103 NULL
|
|
952 |
104 NULL 104 NULL
|
|
953 |
105 NULL 105 NULL
|
|
954 |
106 NULL 106 NULL
|
|
955 |
107 NULL 107 NULL
|
|
956 |
108 NULL 108 NULL
|
|
957 |
109 NULL 109 NULL
|
|
958 |
110 NULL 110 NULL
|
|
959 |
111 NULL 111 NULL
|
|
960 |
112 NULL 112 NULL
|
|
961 |
113 NULL 113 NULL
|
|
962 |
114 NULL 114 NULL
|
|
963 |
115 NULL 115 NULL
|
|
964 |
116 NULL 116 NULL
|
|
965 |
117 NULL 117 NULL
|
|
966 |
118 NULL 118 NULL
|
|
967 |
119 NULL 119 NULL
|
|
968 |
120 NULL 120 NULL
|
|
969 |
121 NULL 121 NULL
|
|
970 |
122 NULL 122 NULL
|
|
971 |
123 NULL 123 NULL
|
|
972 |
124 NULL 124 NULL
|
|
973 |
125 NULL 125 NULL
|
|
974 |
126 NULL 126 NULL
|
|
975 |
127 NULL 127 NULL
|
|
976 |
128 NULL 128 NULL
|
|
977 |
DROP TABLE IF EXISTS t1,t2;
|
|
978 |
End of 5.0 tests.
|