REPLACE INTO `comment_origin_` SELECT * FROM `comment`; -- 80.1G REPLACE INTO `user_origin_` SELECT * FROM `user`; -- 5.20G DELETE `comment` FROM `comment` INNER JOIN `comment_origin_` ON `comment`.comment_id = `comment_origin_`.comment_id; DELETE `user` FROM `user` INNER JOIN `user_origin_` ON `user`.user_id = `user_origin_`.user_id;