按某几列删除表中重复数据
开始获取了重复列的数据，想了好久不知道怎么在那基础上删除，最后仔细一想，通过下面那个sql多执行几次知道执行结果为0就表示重复数据已经删除了撒
delete from warehouse_summary t where t.summary_id in (
select min(t.summary_id)
from warehouse_summary t
left join warehouse_Info wi
on t.warehouse_id = wi.warehouseid
where
t.status = 1 group by wi.warehouseid,t.product_id having count(*)>1
)
