数据:
a,1
a,2
a,3
b,2
b,1
想求出 a.3,b,2的数据
------解决方案--------------------
- SQL code
或者select * from test awhere a.col2=(select max(col2) from test b where a.col1=b.col2)
或者select * from test awhere a.col2=(select max(col2) from test b where a.col1=b.col2)