select * from table where exists(select 字段名 from table group by 字段名 having count(字段名)>1)
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转载于:https://www.cnblogs.com/wifi/archive/2011/12/12/2285116.html
select * from table where exists(select 字段名 from table group by 字段名 having count(字段名)>1)
转载于:https://www.cnblogs.com/wifi/archive/2011/12/12/2285116.html