Question

我有一张这样的表：

ID|Name|Issue|Location   
1 |01  |A    |.....  
2 |01  |B    |.....    
3 |02  |A    |.....  
4 |02  |B    |.....  
5 |02  |C    |.....   
6 |03  |A    |.....

我想查询将返回每个的最大（问题）的id，名称，问题，位置喜欢：

 2 |01  |B    |.....  
 5 |02  |C    |.....  
 6 |03  |A    |.....

由于

Answer 1

select t.* 
from tab t 
join (
    select name, max(issue) as issue
    from tab
    group by name
) t1 on t.name = t1.name and t.issue = t1.issue

SQL查询之谜

1 个答案: