328
328
drop table t1,t2,t3;
329
create table t1 (a int not null, b int not null, t time);
330
insert into t1 values (1,1,"00:06:15"),(1,2,"00:06:15"),(1,2,"00:30:15"),(1,3,"00:06:15"),(1,3,"00:30:15");
331
select a,sec_to_time(sum(time_to_sec(t))) from t1 group by a,b;
332
a sec_to_time(sum(time_to_sec(t)))
336
select distinct a,sec_to_time(sum(time_to_sec(t))) from t1 group by a,b;
337
a sec_to_time(sum(time_to_sec(t)))
340
create table t2 (a int not null primary key, b int);
341
insert into t2 values (1,1),(2,2),(3,3);
342
select t1.a,sec_to_time(sum(time_to_sec(t))) from t1 left join t2 on (t1.b=t2.a) group by t1.a,t2.b;
343
a sec_to_time(sum(time_to_sec(t)))
347
select distinct t1.a,sec_to_time(sum(time_to_sec(t))) from t1 left join t2 on (t1.b=t2.a) group by t1.a,t2.b;
348
a sec_to_time(sum(time_to_sec(t)))
352
329
create table t1 (a int not null,b char(5), c text);
353
330
insert into t1 (a) values (1),(2),(3),(4),(1),(2),(3),(4);
354
331
select distinct a from t1 group by b,a having a > 2 order by a desc;
402
379
test2@testdomain.com R002
403
380
test3@testdomain.com Z001
404
381
drop table t1,t2;
405
CREATE TABLE t1 (privatemessageid int unsigned NOT NULL auto_increment, folderid smallint NOT NULL default '0', userid int unsigned NOT NULL default '0', touserid int unsigned NOT NULL default '0', fromuserid int unsigned NOT NULL default '0', title varchar(250) NOT NULL default '', message mediumtext NOT NULL, dateline int unsigned NOT NULL default '0', showsignature smallint NOT NULL default '0', iconid smallint unsigned NOT NULL default '0', messageread smallint NOT NULL default '0', readtime int unsigned NOT NULL default '0', receipt smallint unsigned NOT NULL default '0', deleteprompt smallint unsigned NOT NULL default '0', multiplerecipients smallint unsigned NOT NULL default '0', PRIMARY KEY (privatemessageid), KEY userid (userid)) ENGINE=MyISAM;
382
CREATE TABLE t1 (privatemessageid int NOT NULL auto_increment, folderid int NOT NULL default '0', userid int NOT NULL default '0', touserid int NOT NULL default '0', fromuserid int NOT NULL default '0', title varchar(250) NOT NULL default '', message mediumtext NOT NULL, dateline int NOT NULL default '0', showsignature int NOT NULL default '0', iconid int NOT NULL default '0', messageread int NOT NULL default '0', readtime int NOT NULL default '0', receipt int NOT NULL default '0', deleteprompt int NOT NULL default '0', multiplerecipients int NOT NULL default '0', PRIMARY KEY (privatemessageid), KEY userid (userid));
406
383
INSERT INTO t1 VALUES (128,0,33,33,8,':D','',996121863,1,0,2,996122850,2,0,0);
407
CREATE TABLE t2 (userid int unsigned NOT NULL auto_increment, usergroupid smallint unsigned NOT NULL default '0', username varchar(50) NOT NULL default '', password varchar(50) NOT NULL default '', email varchar(50) NOT NULL default '', styleid smallint unsigned NOT NULL default '0', parentemail varchar(50) NOT NULL default '', coppauser smallint NOT NULL default '0', homepage varchar(100) NOT NULL default '', icq varchar(20) NOT NULL default '', aim varchar(20) NOT NULL default '', yahoo varchar(20) NOT NULL default '', signature mediumtext NOT NULL, adminemail smallint NOT NULL default '0', showemail smallint NOT NULL default '0', invisible smallint NOT NULL default '0', usertitle varchar(250) NOT NULL default '', customtitle smallint NOT NULL default '0', joindate int unsigned NOT NULL default '0', cookieuser smallint NOT NULL default '0', daysprune smallint NOT NULL default '0', lastvisit int unsigned NOT NULL default '0', lastactivity int unsigned NOT NULL default '0', lastpost int unsigned NOT NULL default '0', posts smallint unsigned NOT NULL default '0', timezoneoffset varchar(4) NOT NULL default '', emailnotification smallint NOT NULL default '0', buddylist mediumtext NOT NULL, ignorelist mediumtext NOT NULL, pmfolders mediumtext NOT NULL, receivepm smallint NOT NULL default '0', emailonpm smallint NOT NULL default '0', pmpopup smallint NOT NULL default '0', avatarid smallint NOT NULL default '0', avatarrevision int unsigned NOT NULL default '0', options smallint NOT NULL default '15', birthday date NOT NULL default '0000-00-00', maxposts smallint NOT NULL default '-1', startofweek smallint NOT NULL default '1', ipaddress varchar(20) NOT NULL default '', referrerid int unsigned NOT NULL default '0', nosessionhash smallint NOT NULL default '0', autorefresh smallint NOT NULL default '-1', messagepopup tinyint NOT NULL default '0', inforum smallint unsigned NOT NULL default '0', ratenum smallint unsigned NOT NULL default '0', ratetotal smallint unsigned NOT NULL default '0', allowrate smallint unsigned NOT NULL default '1', PRIMARY KEY (userid), KEY usergroupid (usergroupid), KEY username (username), KEY inforum (inforum)) ENGINE=MyISAM;
408
INSERT INTO t2 VALUES (33,6,'Kevin','0','kevin@stileproject.com',1,'',0,'http://www.stileproject.com','','','','',1,1,0,'Administrator',0,996120694,1,-1,1030996168,1031027028,1030599436,36,'-6',0,'','','',1,0,1,0,0,15,'0000-00-00',-1,1,'64.0.0.0',0,1,-1,0,0,4,19,1);
384
CREATE TABLE t2 (userid int NOT NULL auto_increment, usergroupid int NOT NULL default '0', username varchar(50) NOT NULL default '', password varchar(50) NOT NULL default '', email varchar(50) NOT NULL default '', styleid int NOT NULL default '0', parentemail varchar(50) NOT NULL default '', coppauser int NOT NULL default '0', homepage varchar(100) NOT NULL default '', icq varchar(20) NOT NULL default '', aim varchar(20) NOT NULL default '', yahoo varchar(20) NOT NULL default '', signature mediumtext NOT NULL, adminemail int NOT NULL default '0', showemail int NOT NULL default '0', invisible int NOT NULL default '0', usertitle varchar(250) NOT NULL default '', customtitle int NOT NULL default '0', joindate int NOT NULL default '0', cookieuser int NOT NULL default '0', daysprune int NOT NULL default '0', lastvisit int NOT NULL default '0', lastactivity int NOT NULL default '0', lastpost int NOT NULL default '0', posts int NOT NULL default '0', timezoneoffset varchar(4) NOT NULL default '', emailnotification int NOT NULL default '0', buddylist mediumtext NOT NULL, ignorelist mediumtext NOT NULL, pmfolders mediumtext NOT NULL, receivepm int NOT NULL default '0', emailonpm int NOT NULL default '0', pmpopup int NOT NULL default '0', avatarid int NOT NULL default '0', avatarrevision int NOT NULL default '0', options int NOT NULL default '15', birthday date NULL, maxposts int NOT NULL default '-1', startofweek int NOT NULL default '1', ipaddress varchar(20) NOT NULL default '', referrerid int NOT NULL default '0', nosessionhash int NOT NULL default '0', autorefresh int NOT NULL default '-1', messagepopup int NOT NULL default '0', inforum int NOT NULL default '0', ratenum int NOT NULL default '0', ratetotal int NOT NULL default '0', allowrate int NOT NULL default '1', PRIMARY KEY (userid), KEY usergroupid (usergroupid), KEY username (username), KEY inforum (inforum));
385
INSERT INTO t2 VALUES (33,6,'Kevin','0','kevin@stileproject.com',1,'',0,'http://www.stileproject.com','','','','',1,1,0,'Administrator',0,996120694,1,-1,1030996168,1031027028,1030599436,36,'-6',0,'','','',1,0,1,0,0,15,NULL,-1,1,'64.0.0.0',0,1,-1,0,0,4,19,1);
409
386
SELECT DISTINCT t1.*, t2.* FROM t1 LEFT JOIN t2 ON (t2.userid = t1.touserid);
410
387
privatemessageid folderid userid touserid fromuserid title message dateline showsignature iconid messageread readtime receipt deleteprompt multiplerecipients userid usergroupid username password email styleid parentemail coppauser homepage icq aim yahoo signature adminemail showemail invisible usertitle customtitle joindate cookieuser daysprune lastvisit lastactivity lastpost posts timezoneoffset emailnotification buddylist ignorelist pmfolders receivepm emailonpm pmpopup avatarid avatarrevision options birthday maxposts startofweek ipaddress referrerid nosessionhash autorefresh messagepopup inforum ratenum ratetotal allowrate
411
128 0 33 33 8 :D 996121863 1 0 2 996122850 2 0 0 33 6 Kevin 0 kevin@stileproject.com 1 0 http://www.stileproject.com 1 1 0 Administrator 0 996120694 1 -1 1030996168 1031027028 1030599436 36 -6 0 1 0 1 0 0 15 0000-00-00 -1 1 64.0.0.0 0 1 -1 0 0 4 19 1
388
128 0 33 33 8 :D 996121863 1 0 2 996122850 2 0 0 33 6 Kevin 0 kevin@stileproject.com 1 0 http://www.stileproject.com 1 1 0 Administrator 0 996120694 1 -1 1030996168 1031027028 1030599436 36 -6 0 1 0 1 0 0 15 NULL -1 1 64.0.0.0 0 1 -1 0 0 4 19 1
412
389
DROP TABLE t1,t2;
413
390
CREATE TABLE t1 (a int primary key, b int, c int);
414
391
INSERT t1 VALUES (1,2,3);
608
585
SELECT DISTINCT a,a FROM t1 WHERE b < 12 ORDER BY a;
611
CREATE TABLE t1 (a CHAR(1));
612
INSERT INTO t1 VALUES('A'), (0);
613
SELECT a FROM t1 WHERE a=0;
617
SELECT DISTINCT a FROM t1 WHERE a=0;
622
CREATE TABLE t1 (a DATE);
623
INSERT INTO t1 VALUES ('1972-07-29'), ('1972-02-06');
624
EXPLAIN SELECT (SELECT DISTINCT a FROM t1 WHERE a = '2002-08-03');
625
id select_type table type possible_keys key key_len ref rows Extra
626
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used
627
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where
628
EXPLAIN SELECT (SELECT DISTINCT ADDDATE(a,1) FROM t1
629
WHERE ADDDATE(a,1) = '2002-08-03');
630
id select_type table type possible_keys key key_len ref rows Extra
631
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used
632
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where
633
CREATE TABLE t2 (a CHAR(5) CHARACTER SET latin1 COLLATE latin1_general_ci);
634
INSERT INTO t2 VALUES (0xf6);
635
INSERT INTO t2 VALUES ('oe');
636
SELECT COUNT(*) FROM (SELECT DISTINCT a FROM t2) dt;
640
(SELECT DISTINCT a FROM t2 WHERE a='oe' COLLATE latin1_german2_ci) dt;
644
588
CREATE TABLE t1 (a INT, UNIQUE (a));
645
589
INSERT INTO t1 VALUES (4),(null),(2),(1),(null),(3);
646
590
EXPLAIN SELECT DISTINCT a FROM t1;