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percona-toolkit/t/lib/samples/dupe_keys_thrice.sql

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SQL

CREATE TABLE `dupe_key` (
`a` int(11) default NULL,
`b` int(11) default NULL,
`c` int(11) default NULL,
KEY `a` (`a`),
KEY `a_2` (`a`,`b`),
KEY `a_3` (`a`,`b`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1