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CREATE TABLE `user` (
`db_id` varchar(255) NOT NULL,
`name` varchar(45) default NULL,
`age` int(10) unsigned NOT NULL,
`address` varchar(45) default NULL,
PRIMARY KEY (`db_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
// ÉèÖÃname='888'µÄageµÈÓÚname='111' +10
update users u,(SELECT age from users where name="111") as t
set u.age = t.age+10
where name="888";
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