Question

我有一张包含以下内容的表：

EXTDEP EXTCODE PRICE
200     10001   200
500     10001   25
600     10001   36

我想要的结果：

EXTCODE PRICE200 PRICE500 PRICE600
10001    200       25         36

我得到的结果：

EXTCODE PRICE200 PRICE500 PRICE600
10001    NULL      NULL        36
10001    NULL       25        NULL
10001    200       NULL       NULL

我的代码：

SELECT  
      [ExtCode]

      case when extdep = '200' then price1 end as '200', 
      case when extdep = '500' then price1 end AS '500', 
      case when extdep = '600' then price1 end AS '600'

有什么想法吗？：）

Answer 1

尝试将聚合应用于CASE语句：

SELECT  
      [ExtCode],

      MAX(case when extdep = '200' then price1 end) as '200', 
      MAX(case when extdep = '500' then price1 end) AS '500', 
      MAX(case when extdep = '600' then price1 end) AS '600'
FROM your_table
GROUP BY ExtCode

Answer 2

您也可以像这样使用PIVOT功能：

SELECT [ExtCode],
     [1] AS '200',
     [2] AS'500',
     [3] AS'600'
FROM
 (
       Select [ExtCode], extdep, price1
       From your_table
  ) src
PIVOT
  ( 
      Max(price1)
      For extdep in ([1], [2], [3])
  ) piv

Answer 3

这是使用PIVOT

的替代方法

SELECT *
FROM [table]
    PIVOT (MAX(PRICE) FOR EXTDEP IN ([200], [500], [600])) T

这会生成以下输出

EXTCODE     200         500         600
----------- ----------- ----------- -----------
10001       200         25          36

一行中多个case语句的SQL结果

3 个答案: