MsSql去掉重复记录

id,title,time,image,author FROM news WHERE (title IN (SELECT title FROM news GROUP BY title HAVING (COUNT(title) > 1)))

删除多余的记录

delete from news

WHERE (title IN (SELECT title FROM news GROUP BY title HAVING (COUNT(title) > 1)))

AND  (id NOT IN (SELECT MIN(id) AS nid FROM news GROUP BY title HAVING (COUNT(title) > 1)))

使用min的原因是保留发布时间最早的记录，如果要保留时间最后发布的可以使用max

MsSql去掉重复记录

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