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b
NULL
b
1a20 1e+ 1e+10
1 10000000001
a$1 $b c$
1 2 3
table type possible_keys key key_len ref rows Extra
t2 ref B B 21 const 1 where used
a B
3 world
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
`b` int(11) default NULL,
PRIMARY KEY (`a`),
KEY `b` (`b`),
KEY `b_2` (`b`),
KEY `b_3` (`b`),
KEY `b_4` (`b`),
KEY `b_5` (`b`),
KEY `b_6` (`b`),
KEY `b_7` (`b`),
KEY `b_8` (`b`),
KEY `b_9` (`b`),
KEY `b_10` (`b`),
KEY `b_11` (`b`),
KEY `b_12` (`b`),
KEY `b_13` (`b`),
KEY `b_14` (`b`),
KEY `b_15` (`b`),
KEY `b_16` (`b`),
KEY `b_17` (`b`),
KEY `b_18` (`b`),
KEY `b_19` (`b`),
KEY `b_20` (`b`),
KEY `b_21` (`b`),
KEY `b_22` (`b`),
KEY `b_23` (`b`),
KEY `b_24` (`b`),
KEY `b_25` (`b`),
KEY `b_26` (`b`),
KEY `b_27` (`b`),
KEY `b_28` (`b`),
KEY `b_29` (`b`),
KEY `b_30` (`b`),
KEY `b_31` (`b`)
) TYPE=MyISAM
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