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CREATE TABLE `words_data` (
`id` int(11) NOT NULL auto_increment,
`words` varchar(50) default '',
`pid` int(8) default '0',
`baiyephp` int(11) default '0',
PRIMARY KEY (`id`),
KEY `baiyephp` (`baiyephp`),
KEY `words` (`words`),
KEY `pid` (`pid`),
KEY `pid_id` (`id`,`pid`)
) ENGINE=MyISAM AUTO_INCREMENT=1961736 DEFAULT CHARSET=utf8
Explain statement: explain select id from words_data where pid=232632; but no possible_keys and no keys listed in the columns.
Explain yields in my test environment:
Which seems to indicate that there are no data in the table with pid=232632