Question

在SQL 2000上：

我正在尝试编写一个动态UDF，它将根据输入条件提取五个字段之一的值。以下是我到目前为止的情况：

CREATE FUNCTION dbo.fBudgetBid ( @sJob int, @sCO nvarchar(10), @sCat nvarchar(10) )
RETURNS float
AS
BEGIN
  Declare @ERC float
  Set @ERC = Case @sCat
  WHEN 'Field' Then Select [Field] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO  
  WHEN 'Eng' Then Select [Eng] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO  
  WHEN 'PM' Then Select [PM] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO  
  WHEN 'Shop' Then Select [Shop] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO  
  WHEN 'Purch' Then Select [Purch] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO  
  END
  Return @ERC
END

我使用了一个SELECT语句来返回一个值，并且我使用了CASE WHEN THEN结构来返回硬编码值。没有运气混合两者。 **这些名字已被更改以保护无辜者。 **

更新：按照以下方式工作。括号在世界上造就了一切。

BEGIN
 Return (Case @sCat
  WHEN 'Field' Then (Select [Field] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO)
  WHEN 'Eng' Then (Select [Eng] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO)  
  WHEN 'PM' Then (Select [PM] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO)
  WHEN 'Shop' Then (Select [Shop] From [dbo].[Estimate] Where [Job] = @sJob AND [CO] = @sCO)  
  WHEN 'Purch' Then (Select [Purch] From [dbo].[Estimate] Where [Job] = @sJob AND [] ] = @sCO)
  END)
END

Answer 1

试试这个，看看它是否符合您的要求。

DEClARE @ERC FLOAT

SELECT @ERC = CASE @sCat WHEN 'Field' THEN [Field] 
             WHEN 'Eng' THEN [Eng] 
             WHEN 'PM' THEN [PM] 
             WHEN 'Shop' THEN [Shop] 
             WHEN 'Purch' THEN [Purch] END
FROM [dbo].[Estimate] 
WHERE [Job] = @sJob 
AND [CO] = @sCO  

RETURN @ERC

需要有关SQL UDF的帮助？

1 个答案: