Question

SQL新手，经验丰富的VBA-er需要一些帮助。

我有一个关于需要获得特定类型的不同费用的交易的视图。费用在表中，其中一些字段是必需的，而其他字段可能是NULL。通过这种方式，我们可以设置一般的费用结构，并且仍然允许特定的特价。

我现在的目标是找到最合适的费用。这是费用：

符合所有必需条件，
匹配所有可选标准或对其有NULL，
具有最匹配的所有费用的可选标准，通过1.和2.

现在我得到了这个代码的一个版本，但作为一个程序。但是因为我需要在视图中使用它，所以我不能使用该版本，并且函数中不允许使用临时表。

在查看此论坛和其他人之后，我得出的结果仍然是2个错误：
1. ErrorMessage：'@tblTEMP'附近的语法不正确，
2. ErrorMessage：'BEGIN'附近的语法不正确。

我当前的脚本如下（使用局部变量表）：

ALTER FUNCTION [dbo].[fnStandardFeeBAK]
  (@Type_Id BIGINT, @Party_Id BIGINT, @I_A_Id BIGINT, @Grid_Id BIGINT,
  @Market_Id BIGINT, @Counterparty_Id BIGINT, @Product_Id BIGINT, 
  @DealDate DATETIME)
RETURNS TABLE

AS

BEGIN
  DECLARE @tblTEMP TABLE (Standard_Fee DECIMAL(38,8), Currency VARCHAR(50), 
  Unit VARCHAR(50), Unit2 VARCHAR(50), MatchScore BIGINT);
  WITH @tblTEMP AS 
  (SELECT Standard_Fee, V2.Element AS Currency, V1.Element AS Unit,
V2.Element+'/'+V1.Element AS Unit2,
  SF.I_A_Id, SF.Grid_Id, SF.Product_Id, SF.Counterparty_Id,
  (CASE WHEN SF.I_A_Id = @I_A_Id THEN 1 ELSE 0 END +
      CASE WHEN SF.Grid_Id = @Grid_Id THEN 1 ELSE 0 END +
      CASE WHEN SF.Product_Id = @Product_Id THEN 1 ELSE 0 END +
      CASE WHEN SF.Counterparty_Id = @Counterparty_Id THEN 1 ELSE 0 END) 
      AS MatchScore
  FROM tblStandard_Fee AS SF
  LEFT JOIN tblElement AS V1 ON V1.Element_Id = SF.Unit_Id
  LEFT JOIN tblElement AS V2 ON V2.Element_Id = SF.Currency_Id

  WHERE SF.Type_Id = @Type_Id AND SF.Party_Id = @Party_Id AND 
    SF.Market_Id = @Market_Id
    AND SF.Date_From < @DealDate 
    AND (SF.Date_To > @DealDate OR SF.Date_To IS NULL)
    AND (SF.I_A_Id = @I_A_Id OR SF.I_A_Id IS NULL)
    AND (SF.Grid_Id = @Grid_Id OR SF.Grid_Id IS NULL)
    AND (SF.Product_Id = @Product_Id OR SF.Product_Id IS NULL)
    AND (SF.Counterparty_Id = @Counterparty_Id OR SF.Counterparty_Id IS NULL))
RETURN
  SELECT Standard_Fee, Currency, Unit, Unit2
  FROM @tblTEMP
  WHERE MatchScore= MAX(MatchScore)
END

如果不让我知道，我希望我的问题很清楚。

感谢您提出建议，甚至用最后一点解决我的问题！

因此所有LittleBobbyTables的帮助结合起来给了我一个有效的结果。请不要忘记给他这个信用。

工作代码：

ALTER FUNCTION [dbo].[fnStandardFeeBAK]
(@Type_Id BIGINT, @Party_Id BIGINT, @I_A_Id BIGINT, @Grid_Id BIGINT,
@Market_Id BIGINT, @Counterparty_Id BIGINT, @Product_Id BIGINT, @DealDate DATETIME)

RETURNS @YourTable TABLE 
(
    -- Columns returned by the function
    Standard_Fee DECIMAL(38,8), 
    Currency VARCHAR(50), 
    Unit VARCHAR(50), 
    Unit2 VARCHAR(50)
)
AS

BEGIN   
    WITH YourCTE(Standard_Fee, Currency, Unit, Unit2, MatchScore) AS
    (
    SELECT Standard_Fee, V2.Element AS Currency, V1.Element AS Unit,
        V2.Element + '/' + V1.Element AS Unit2,
        (CASE WHEN SF.I_A_Id = @I_A_Id THEN 1 ELSE 0 END +
        CASE WHEN SF.Grid_Id = @Grid_Id THEN 1 ELSE 0 END +
        CASE WHEN SF.Product_Id = @Product_Id THEN 1 ELSE 0 END +
        CASE WHEN SF.Counterparty_Id = @Counterparty_Id THEN 1 ELSE 0 END) 
        AS MatchScore
    FROM tblStandard_Fee AS SF
        LEFT JOIN tblElement AS V1 ON V1.Element_Id = SF.Unit_Id
        LEFT JOIN tblElement AS V2 ON V2.Element_Id = SF.Currency_Id

    --Type_ID, Party_ID and Market_Id are always present, others can have NULL values
    WHERE SF.Type_Id = @Type_Id AND SF.Party_Id = @Party_Id 
            AND SF.Market_Id = @Market_Id AND SF.Date_From < @DealDate 
            AND (SF.Date_To > @DealDate OR SF.Date_To IS NULL)
            AND (SF.I_A_Id = @I_A_Id OR SF.I_A_Id IS NULL)
            AND (SF.Grid_Id = @Grid_Id OR SF.Grid_Id IS NULL)
            AND (SF.Product_Id = @Product_Id OR SF.Product_Id IS NULL)
            AND (SF.Counterparty_Id = @Counterparty_Id OR SF.Counterparty_Id IS NULL)
    GROUP BY Standard_Fee, V1.Element, V2.Element, SF.I_A_Id, SF.Grid_Id, SF.Product_Id, SF.Counterparty_Id
    )
    INSERT @YourTable 
        SELECT Standard_Fee, Currency, Unit, Unit2
        FROM YourCTE 
        GROUP BY MatchScore, Standard_Fee, Currency, Unit, Unit2
        HAVING MatchScore = (SELECT MAX(MatchScore) FROM YourCTE)

     RETURN;
END

Answer 1

请参阅Table-Valued User-Defined Functions文档，正确的语法是：

ALTER FUNCTION dbo.fnStandardFeeBAK(@Type_Id BIGINT, @Party_Id BIGINT, 
    @I_A_Id BIGINT, @Grid_Id BIGINT,  @Market_Id BIGINT, 
    @Counterparty_Id BIGINT, @Product_Id BIGINT, 
    @DealDate DATETIME)

RETURNS @YourTable TABLE 
(
    -- Columns returned by the function
    Standard_Fee DECIMAL(38,8), 
    Currency VARCHAR(50), 
    Unit VARCHAR(50), 
    Unit2 VARCHAR(50)
)
AS

最后：

    INSERT @YourTable 
    SELECT Standard_Fee, Currency, Unit, Unit2
    FROM YourCTE
    WHERE MatchScore= MAX(MatchScore)
    RETURN;
END;

编辑：搞砸了CTE，你不需要临时表。

把它们放在一起，你得到：

ALTER FUNCTION dbo.fnStandardFeeBAK(@Type_Id BIGINT, @Party_Id BIGINT, 
    @I_A_Id BIGINT, @Grid_Id BIGINT,  @Market_Id BIGINT, 
    @Counterparty_Id BIGINT, @Product_Id BIGINT, 
    @DealDate DATETIME)

RETURNS @YourTable TABLE 
(
    -- Columns returned by the function
    Standard_Fee DECIMAL(38,8), 
    Currency VARCHAR(50), 
    Unit VARCHAR(50), 
    Unit2 VARCHAR(50)
)
AS

BEGIN
 WITH YourCTE (Standard_Fee, Currency, Unit, Unit2, MatchScore) AS 
  (SELECT Standard_Fee, V2.Element AS Currency, V1.Element AS Unit,
V2.Element+'/'+V1.Element AS Unit2,
  SF.I_A_Id, SF.Grid_Id, SF.Product_Id, SF.Counterparty_Id,
  (CASE WHEN SF.I_A_Id = @I_A_Id THEN 1 ELSE 0 END +
      CASE WHEN SF.Grid_Id = @Grid_Id THEN 1 ELSE 0 END +
      CASE WHEN SF.Product_Id = @Product_Id THEN 1 ELSE 0 END +
      CASE WHEN SF.Counterparty_Id = @Counterparty_Id THEN 1 ELSE 0 END) 
      AS MatchScore
  FROM tblStandard_Fee AS SF
  LEFT JOIN tblElement AS V1 ON V1.Element_Id = SF.Unit_Id
  LEFT JOIN tblElement AS V2 ON V2.Element_Id = SF.Currency_Id

  WHERE SF.Type_Id = @Type_Id AND SF.Party_Id = @Party_Id AND 
    SF.Market_Id = @Market_Id
    AND SF.Date_From < @DealDate 
    AND (SF.Date_To > @DealDate OR SF.Date_To IS NULL)
    AND (SF.I_A_Id = @I_A_Id OR SF.I_A_Id IS NULL)
    AND (SF.Grid_Id = @Grid_Id OR SF.Grid_Id IS NULL)
    AND (SF.Product_Id = @Product_Id OR SF.Product_Id IS NULL)
    AND (SF.Counterparty_Id = @Counterparty_Id OR SF.Counterparty_Id IS NULL))

  INSERT @YourTable 
    SELECT Standard_Fee, Currency, Unit, Unit2
    FROM YourCTE
    WHERE MatchScore= MAX(MatchScore)
  RETURN;
END;

SQL Server：在FUNCTION中使用大小写

1 个答案: