1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
drop table if exists t1,t2;
CREATE TABLE t1 (c int not null, d char (10) not null);
insert into t1 values(1,""),(2,"a"),(3,"b");
CREATE TEMPORARY TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(4,"e"),(5,"f"),(6,"g");
alter table t1 rename t2;
select * from t1;
c d
1
2 a
3 b
select * from t2;
a b
4 e
5 f
6 g
CREATE TABLE t2 (x int not null, y int not null);
alter table t2 rename t1;
select * from t1;
a b
4 e
5 f
6 g
create TEMPORARY TABLE t2 engine=MEMORY select * from t1;
create TEMPORARY TABLE IF NOT EXISTS t2 (a int) engine=MEMORY;
Warnings:
Note 1050 Table 't2' already exists
CREATE TEMPORARY TABLE t1 (a int not null, b char (10) not null);
ERROR 42S01: Table 'test.#t1' already exists
ALTER TABLE t1 RENAME t2;
ERROR 42S01: Table 'test.#t2' already exists
select * from t2;
a b
4 e
5 f
6 g
alter table t2 add primary key (a,b);
drop table t1,t2;
select * from t1;
c d
1
2 a
3 b
drop table t2;
create temporary table t1 select *,2 as "e" from t1;
select * from t1;
c d e
1 2
2 a 2
3 b 2
drop table t1;
drop table t1;
CREATE TABLE t1 (pkCrash INTEGER PRIMARY KEY,strCrash VARCHAR(255));
INSERT INTO t1 ( pkCrash, strCrash ) VALUES ( 1, '1');
SELECT CONCAT_WS(pkCrash, strCrash) FROM t1;
CONCAT_WS(pkCrash, strCrash)
1
drop table t1;
create temporary table t1 select 1 as 'x';
drop table t1;
CREATE TABLE t1 (x INT);
INSERT INTO t1 VALUES (1), (2), (3);
CREATE TEMPORARY TABLE tmp SELECT *, NULL FROM t1;
drop table t1;
create temporary table t1 (id int not null unique);
create temporary table t2 (id int not null primary key, val int not null);
insert into t1 values (1),(2),(4);
insert into t2 values (1,1),(2,1),(3,1),(4,2);
select one.id, two.val, elt(two.val,'one','two') from t1 one, t2 two where two.id=one.id order by one.id;
id val elt(two.val,'one','two')
1 1 one
2 1 one
4 2 two
drop table t1,t2;
create temporary table t1 (a int not null);
insert into t1 values (1),(1);
alter table t1 add primary key (a);
ERROR 23000: Duplicate entry '1' for key 'PRIMARY'
drop table t1;
CREATE TEMPORARY TABLE t1 (
d datetime default NULL
) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('2002-10-24 14:50:32'),('2002-10-24 14:50:33'),('2002-10-24 14:50:34'),('2002-10-24 14:50:34'),('2002-10-24 14:50:34'),('2002-10-24 14:50:35'),('2002-10-24 14:50:35'),('2002-10-24 14:50:35'),('2002-10-24 14:50:35'),('2002-10-24 14:50:36'),('2002-10-24 14:50:36'),('2002-10-24 14:50:36'),('2002-10-24 14:50:36'),('2002-10-24 14:50:37'),('2002-10-24 14:50:37'),('2002-10-24 14:50:37'),('2002-10-24 14:50:37'),('2002-10-24 14:50:38'),('2002-10-24 14:50:38'),('2002-10-24 14:50:38'),('2002-10-24 14:50:39'),('2002-10-24 14:50:39'),('2002-10-24 14:50:39'),('2002-10-24 14:50:39'),('2002-10-24 14:50:40'),('2002-10-24 14:50:40'),('2002-10-24 14:50:40');
flush status;
select * from t1 group by d;
d
2002-10-24 14:50:32
2002-10-24 14:50:33
2002-10-24 14:50:34
2002-10-24 14:50:35
2002-10-24 14:50:36
2002-10-24 14:50:37
2002-10-24 14:50:38
2002-10-24 14:50:39
2002-10-24 14:50:40
show status like "created_tmp%tables";
Variable_name Value
Created_tmp_disk_tables #
Created_tmp_tables #
drop table t1;
create table t1 (a int, b int, index(a), index(b));
create table t2 (c int auto_increment, d varchar(255), primary key (c));
insert into t1 values (3,1),(3,2);
insert into t2 values (NULL, 'foo'), (NULL, 'bar');
select d, c from t1 left join t2 on b = c where a = 3 order by d;
d c
bar 2
foo 1
drop table t1, t2;
CREATE TABLE t1 (i INT);
CREATE TEMPORARY TABLE t2 (i INT);
DROP TEMPORARY TABLE t2, t1;
ERROR 42S02: Unknown table 't1'
SELECT * FROM t2;
ERROR 42S02: Table 'test.t2' doesn't exist
SELECT * FROM t1;
i
DROP TABLE t1;
End of 4.1 tests.
CREATE TABLE t1 ( c FLOAT( 20, 14 ) );
INSERT INTO t1 VALUES( 12139 );
CREATE TABLE t2 ( c FLOAT(30,18) );
INSERT INTO t2 VALUES( 123456 );
SELECT AVG( c ) FROM t1 UNION SELECT 1;
AVG( c )
12139
1
SELECT 1 UNION SELECT AVG( c ) FROM t1;
1
1
12139
SELECT 1 UNION SELECT * FROM t2 UNION SELECT 1;
1
1
123456
SELECT c/1 FROM t1 UNION SELECT 1;
c/1
12139
1
DROP TABLE t1, t2;
create temporary table t1 (a int);
insert into t1 values (4711);
select * from t1;
a
4711
truncate t1;
insert into t1 values (42);
select * from t1;
a
42
drop table t1;
CREATE TEMPORARY TABLE t1(a INT, b VARCHAR(20));
INSERT INTO t1 VALUES(1, 'val1'), (2, 'val2'), (3, 'val3');
DELETE FROM t1 WHERE a=1;
SELECT count(*) FROM t1;
count(*)
2
DELETE FROM t1;
SELECT * FROM t1;
a b
DROP TABLE t1;
End of 5.1 tests
|