select regid,count(*)
from fkinfo
group by regid
having count(*) >1 查看有没有重复记录.
删除重复记录:
delete not in (select distinct 列名 from 表名)
select regid,count(*)
from fkinfo
group by regid
having count(*) >1 查看有没有重复记录.
删除重复记录:
delete not in (select distinct 列名 from 表名)