sqlite 的去重

1) 找到重复的记录,归类到一个新表里面 max(id) 是想要删除的record

create table ttt as select gallery_url ,max(id) as theid from gallery group by gallery_url having count(*) >=2

 

2) 删除

delete from gallery where id in ( select theid from ttt)

 

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转载自www.cnblogs.com/johnsonshu/p/11710938.html