Question

我正在使用以下数据透视查询：

    select UserId_Fk,Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday
      from CheckInCheckOut

    PIVOT
    (

     SUM(CAST(CountHours as decimal(18,2))) 
     FOR Day
     IN([Sunday],[Monday],[Tuesday],[Wednesday],[Thursday],[Friday],[Saturday])

    )
   as PivotTable

   Table[CheckInCheckOut]     

 CheckInCheckOutId  int 
    UserId_Fk       int 
  CountHours    nvarchar(50)    
         Day    nvarchar(50)

我在这里使用SUM有些不对劲。我试过了

   select SUM(CAST(CountHours as decimal(18,2))) from CheckInCheckOut

给了我正确的结果，但是我无法在数据透视表中使用。

Answer 1

在进行透视查询之前尝试投射数据

  select UserId_Fk,Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday
      from    (Select UserId_Fk,CAST(CountHours as decimal(18,2))as CountHours,[Day]
   from CheckInCheckOut) as convertedtable

    PIVOT
    (

     SUM(CountHours) 
     FOR Day
     IN([Sunday],[Monday],[Tuesday],[Wednesday],[Thursday],[Friday],[Saturday])

    )
   as PivotTable

Answer 2

由于我不使用sql-server / pivot，这只是一个猜测，但它不应该是那里的group by子句吗？即。

...
as PivotTable
group by UserId_Fk, ...

如何在数据透视表中使用SUM（CAST不能在聚合函数中使用）

2 个答案: