sql - 计数和查询

Question

请检查下表：

Id    Code     Name      State       District     Status   
-----------------------------------------------------------
1     10001    ABC       Gujarat     Jamnagar       1
2     10002    BCA       Gujarat     Amreli         0
3     10003    XYZ       NJ          ACX            1
4     10001    VBC       Gujarat     Jamnagar       1

我在下面有疑问

SELECT STATE,
    District,
    SUM(CASE 
            WHEN STATUS = 0
                THEN 1
            ELSE 0
            END) Active,
    SUM(CASE 
            WHEN STATUS = 1
                THEN 1
            ELSE 0
            END) InActive
FROM TableA
GROUP BY STATE,
    District

现在它将返回以下结果给我

State   District  Active  InActive
------------------------------------
Gujarat  Jamnagar   0       2
Gujarat  Amreli     1       0
NJ       ACX        0       1

但我需要计算相同的单行Code，所以它将返回InActive1 State Gujarat而District Jamnagar不是 2。

我怎样才能做到这一点？

Answer 1

Rater than SUM, select MAX，因此这些值不会聚合。

Answer 2

您如何清楚地选择子查询中的所有列？

SELECT STATE,
    District,
    SUM(CASE 
            WHEN STATUS = 0
                THEN 1
            ELSE 0
            END) Active,
    SUM(CASE 
            WHEN STATUS = 1
                THEN 1
            ELSE 0
            END) InActive
FROM (
    SELECT DISTINCT STATE,
        District,
        STATUS
    FROM tableA
    ) a
GROUP BY STATE,
    District

SQLFiddle 演示