请教SQL 语句
Table t1
 a b
--------------- ---------------
1 2
3 2
Table t2
a b
----------------- ---------------
1 1
3 2

怎样返回T1表中a=1,b=2这条记录？谢谢！

------解决方案--------------------
select t1.* from t1,t2 where t1.a = t2.a and t2.a = t2.b