DELETE FROM spider_927
WHERE 1=1
AND title
in (SELECT * FROM ( (SELECT title
titles
FROM spider_927 GROUP BY title HAVING COUNT(title
)>1) ) a)
AND id not in (SELECT * FROM ( (SELECT MIN(id) ids FROM spider_927 GROUP BY title HAVING COUNT(title
)>1) ) b)
删除重复项,只保留id最小的一项
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转载自www.cnblogs.com/xiujin/p/11515744.html
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