SQL 透视 Table 分组

Question

我有一个table如下：

Date        Ticket  Question    Response
2016-10-01  1       Score?      10
2016-10-01  1       Reason?     Awesome
2016-10-02  2       Score?      9
2016-10-02  2       Reason?     Good
2016-10-03  3       Score?      8
2016-10-03  3       Reason?     Okay

我想在 SQL 中将其旋转为：

Date        Ticket  Score?  Reason?
2016-10-01  1       10      Awesome
2016-10-02  2       9       Good
2016-10-03  3       8       Okay

有人可以帮忙吗？如果需要，我很乐意提供更多详细信息。

Answer 1

如果不需要动态，一个简单的条件聚合就可以了。

Select Date
      ,Ticket
      ,Score  = max(case when Question='Score?'  then Response else null end)
      ,Reason = max(case when Question='Reason?' then Response else null end)
 From YourTable
 Group By Date,Ticket

Answer 2

SELECT Date,
       Ticket,
       MAX( CASE WHEN Question = 'Score?' THEN Response END          
           ) AS Score?,
       MAX( CASE WHEN Question = 'Reason' THEN Response END          
           ) AS Reason?,  
  FROM table
GROUP BY Date,Ticket 
;

Answer 3

使用 PIVOT 尝试以下操作：

Select * from
(Select * from table) x
PIVOT
(
    MAX(Response) FOR Question IN ([Score?], [Reason?])
) p

SQL 透视 Table 分组

SQL Pivot Table Grouping

sql

sql-server

pivot

group-by