Question

我有一张表有3列A，B，C

我想做这样的查询：

select A, Max(B), ( C in the row having max B ) from Table group by A.

有没有办法进行这样的查询？

测试数据：

A    B    C
2    5    3
2    6    1
4    5    1
4    7    9
6    5    0

预期结果将是：

2    6    1
4    7    9
6    5    0

Answer 1

;WITH CTE AS
(
    SELECT  A,
            B,
            C,
            RN = ROW_NUMBER() OVER(PARTITION BY A ORDER BY B DESC)
    FROM YourTable
)
SELECT A, B, C
FROM CTE
WHERE RN = 1

Answer 2

试试这个

select t.*
from   table t
join   (Select A,max(b) B from table group by A) c
on  c.a=t.a
and c.b=a.b

SQLSERVER分组依据（基于其他列的聚合列）

2 个答案: