帮忙写个SQL，谢谢create table test(a int,b char,c char)insert into test values(1,a,b)insert into
帮忙写个SQL，谢谢
create table test(
a int,
b char,
c char
)
insert into test values(1,'a','b')
insert into test values(2,'a','b')
insert into test values(3,'b','c')
要得到如下结果（请考虑如果有多行相同的数据）：
a b c
----------- ---- ----
1 a b
2 a b
[解决办法]
- SQL code
;with cte as (select b,c,count(1) num from testgroup by b,c having count(1)>1)select * from test t where exists(select 1 from cte where b=t.b and c=t.c)
[解决办法]
- SQL code
SELECT A.*FROM test A INNER JOIN ( SELECT b , c FROM test GROUP BY b , c HAVING COUNT(1) > 1 ) T ON A.b = T.b AND A.c = T.c