查询数据库中某一列有没有重复数据项：
select * from cd_stock where stock_bh in (select stock_bh from cd_stock group by stock_bh having count(stock_bh) >1 )
select * from cd_stock_item where id in (select id from cd_stock_item group by id having count(id) >1 )
查询数据库中某一列有没有重复数据项
标签：重复数 where group by 复数 sele 重复 div pos gpo