使用SQL查询将列转换为行，也许使用pivot？

Question

输入：

Empl ID Name January-16 February-16 March-16    Activity 
----------------------------------------------------------
1234    Test1   30         10         1         Running 
1234    Test1   0           0         8         Sleeping
4567    Test2   20         20         2         Reading 
4567    Test2   0          30         20        Reading 
2345    Test3   10         10         3         Sleeping
2345    Test3   0           0         9         Running 

进入：

Empl ID Name    Date        Costs   Activity 
--------------------------------------------------
1234    Test1   January-16   30     Running 
1234    Test1   February-16  10     Running 
1234    Test1   March-16     1      Running 
1234    Test1   March-16     8      Sleeping

Answer 1

SELECT *
FROM
    #Table
    UNPIVOT (
       Costs FOR C IN ([January-16], [February-16], [March-16])
    ) up
WHERE
    Costs <> 0