delete FROM t_china_policy2 WHERE id in
(
select id from (
SELECT
ta.id
FROM
t_china_policy2 AS ta
WHERE
ta.id <> ( SELECT max( tb.id ) FROM t_china_policy2 AS tb WHERE ta.title = tb.title ))t);
mysql 删除重复数据保留最新一条
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转载自www.cnblogs.com/forthelichking/p/12194986.html
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