列TSQL枢纽部(TSQL PIVOT Part of COLUMNS)

我有以下表，但不能确定是否可以转动一些从表中的列：

CREATE TABLE #test ( id int, Area varchar(10), [grouping] varchar(15), task_1 int, task_2 int)

INSERT INTO #test Values (10,'A','HighNeeds',1, 10)
INSERT INTO #test Values (10,'B','HighNeeds',1, 12)
INSERT INTO #test Values (12,'C','Non HighNeeds',2, 14)

select * from #test
-------------------------------------------------
id  Area    grouping        task_1  task_2
10  A       HighNeeds       1       10
10  B       HighNeeds       1       12
12  C       Non HighNeeds   2       14

What I'm trying to get is:
-------------------------------------------------
id  Area    Tasks      HighNeeds   Non HighNeeds   
10  A       task_1     1           NULL
10  A       task_2     10          NULL
10  B       task_1     1           NULL
10  B       task_2     12          NULL
12  C       task_1     NULL        2
12  C       takk_2     NULL        14

基本上我试图保持ID和Area列，但旋转分组数据和任务栏。

Answer 1:

这是相当棘手-你需要转动Grouping为列，UNPIVOT task_1和task_2为行值：

SELECT *
FROM
(
    SELECT 
        id, Area, grouping, tskCount, Task
    FROM 
        test
    UNPIVOT 
    (
       tskCount
       for Task in (task_1, task_2)
    ) unpvt
) X
PIVOT
(
 SUM(tskCount)
 for grouping in (HighNeeds, [Non HighNeeds])
)pvt;

这里拨弄

文章来源: TSQL PIVOT Part of COLUMNS