查某张表中某字段重复记录大于一的语句
查某张表中某字段重复记录大于1的语句
select * from tab1 where xh in (select xh from tab1 group by xh having count(*)>1 )
select * from tab1 where xh in (select xh from tab1 group by xh having count(*)>1 )