Question

我有以下查询来创建一个以天为列的数据透视表：

SELECT USERID,
CASE WHEN DATEPART(d,DATE) = 26 THEN sick END [26],
CASE WHEN DATEPART(d,DATE) = 27 THEN sick END [27],
CASE WHEN DATEPART(d,DATE) = 28 THEN sick END [28],
/* other days omitted */
CASE WHEN DATEPART(d,DATE) = 25 THEN sick END [25]
FROM tbl_Chktime
WHERE DATE BETWEEN '2017-12-26' AND '2017-12-28'  
AND USERID = '15831'

当我运行此查询时，这是我的输出：

USERID | 26   |  27  |   28   
15831   0.00    NULL    NULL        
15831   NULL    0.00    NULL        
15831   NULL    NULL    0.00

Here is an image of the full output

我不想要那些NULL值。相反，我更喜欢将它显示为0.00，类似于：

USERID | 26   |   27  |  28   
15831   0.00    0.00    0.00

Here is an image showing that

如何更改我的SQL语句，使其输出0.00而不是null？

Answer 1

如果您手动停止转动，并且让SQL服务器为您创建转轴，则可以轻松实现此目的：

SELECT * FROM
(SELECT USERID, DATEPART(d,DATE) pivotHeading, sick
FROM tbl_Chktime
WHERE DATE BETWEEN '2017-12-26' AND '2017-12-28'  
AND USERID = '15831') src
PIVOT (Max(sick) FOR pivotHeading IN ([25], [26], [27], [28])) pt

这样，添加新日期并不会延长查询长度，而且语句更短。

DATE数据透视表日列和数据

1 个答案: