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=heap select * from t1;
create TEMPORARY TABLE IF NOT EXISTS t2 (a int) engine=heap;
CREATE TEMPORARY TABLE t1 (a int not null, b char (10) not null);
ERROR 42S01: Table 't1' already exists
ALTER TABLE t1 RENAME t2;
ERROR 42S01: Table '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(10) not null unique);
create temporary table t2 (id int(10) not null primary key, 
val int(10) 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 1
drop table t1;
CREATE 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	0
Created_tmp_tables	2
drop table t1;
create temporary table t1 as select 'This is temp. table' A;
create view t1 as select 'This is view' A;
select * from t1;
A
This is temp. table
show create table t1;
Table	Create Table
t1	CREATE TEMPORARY TABLE `t1` (
  `A` varchar(19) NOT NULL default ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
show create view t1;
View	Create View
t1	CREATE ALGORITHM=UNDEFINED VIEW `test`.`t1` AS select _latin1'This is view' AS `A`
drop view t1;
select * from t1;
A
This is temp. table
create view t1 as select 'This is view again' A;
select * from t1;
A
This is temp. table
drop table t1;
select * from t1;
A
This is view again
drop view 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;