帮忙解决下菜鸟的问题牙,路过的千万不要错过牙?
查询一张表中重复的记录???
比如
create table a
(
a int,
b int,
)
里面有数据
1,1
2,3
1,1
2,3
4,5
1,1
------解决方案-------------------- create table tb
(
a int,
b int,
)
insert into tb values(1,1)
insert into tb values(2,3)
insert into tb values(1,1)
insert into tb values(2,3)
insert into tb values(4,5)
insert into tb values(1,1)
select tb.* from tb join
(
select tb.a,count(0) as x
from tb
group by tb.a
)qq on tb.a=qq.a
where qq.x <> 1