a	b
1	Testing
2	table
3	t1
1	Testing
2	table
3	t2
a	b
3	t1
3	t2
2	table
2	table
1	Testing
1	Testing
table	type	possible_keys	key	key_len	ref	rows	Extra
t3	range	a	a	4	NULL	10	where used
table	type	possible_keys	key	key_len	ref	rows	Extra
t3	range	a	a	4	NULL	10	where used
a	b
10	Testing
10	Testing
a	b
1	Testing
1	Testing
2	table
2	table
3	t1
3	t2
4	Testing
4	Testing
5	table
5	table
6	t1
6	t2
7	Testing
7	Testing
8	table
8	table
9	t2
9	t2
a	b
11	table
11	table
12	t1
12	t1
13	Testing
13	Testing
14	table
14	table
15	t2
15	t2
16	Testing
16	Testing
17	table
17	table
18	t2
18	t2
19	Testing
19	Testing
table	type	possible_keys	key	key_len	ref	rows	Extra
t3	index	NULL	a	4	NULL	1131	Using index
a
699
698
697
696
695
694
693
692
691
690
a
416
415
415
414
414
413
413
412
412
411
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int(11) NOT NULL default '0',
  `b` char(20) default NULL,
  KEY `a` (`a`)
) TYPE=MRG_MyISAM UNION=(t1,t2)
c
test1
test1
test1
test2
test2
test2
c
test1
test1
test1
test2
test2
test2
c
c
incr	othr
incr	othr
1	10
2	24
4	33
3	53
count(*)
10
count(*)
20
count(*)
20
Table	Create Table
t3	CREATE TABLE `t3` (
  `incr` int(11) NOT NULL default '0',
  `othr` int(11) NOT NULL default '0',
  PRIMARY KEY  (`incr`)
) TYPE=MRG_MyISAM UNION=(t1,t2)
Table	Create Table
t3	CREATE TABLE `t3` (
  `incr` int(11) NOT NULL default '0',
  `othr` int(11) NOT NULL default '0'
) TYPE=MRG_MyISAM UNION=(t1,t2)
a
a	b
1	1
1	2