檢查3個表的SQL函數

Question

我有這個函數的語法，但是我完全沒用，至於如何將條件放入代碼（SQL），所以它會返回一個答案。

我有三個表，

T1.number varchar(max) 
T1.date datetime 
T1.ctps int 

T2.number varchar(max) 
T2.addedDate date 
T2.RemovedDate date 
T2.ctps int 

T3.OType varchar(max) 
T3.LNumber varchar(max) 

和三個變量，

@LNumber varchar(max), 
@OType varchar(max), 
@CDate datetime 

我需要的功能，採取行號進入表1檢查數量在那裏，如果它是那麼需要獲取OType名稱，如果是LTD或PLC，則需要檢查CPTS標誌是否設置爲1，如果是，那麼它需要檢查契約日期是否對T1.Date，如果在T1.Date之前有contrcatdate，則返回「否「如果contractdate晚於T1.Date，則返回」Yes「

這裏是我的學嘗試沒有很好的，用我的功能的，如果別人staement但不知道如何實現，要麼笑

任何幫助，將不勝感激

IF OBJECT_ID(N'TPS_Checker', N'FN') IS NOT NULL 

    DROP FUNCTION TPS_Checker ; 

GO 


SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
-- ============================================= 
-- Author:  <Author,,Name> 
-- Create date: <Create Date, ,> 
-- Description: <Description, ,> --@LineNumber = u.CLI, @OrganisationType = o.Name, @ContractDate = c.ContractDate 
-- ============================================= 
CREATE FUNCTION TPS_Checker 
(@LineNumber VARCHAR(MAX), @ContractDate DATETIME, @OrganisationType VARCHAR) 
RETURNS VARCHAR(4) 
AS 


BEGIN 

DECLARE @Answer varchar(4) 

SELECT @Answer = CASE 
       WHEN ((((((@LineNumber = [U].[CLI]) AND @OrganisationType = 'PLC') OR @OrganisationType = 'LTD') AND [U].[Date] IS NOT NULL) AND @ContractDate < [U].[Date]) AND [U].[CTPS] = 0) THEN 'No' 
       WHEN ((((((@LineNumber = [U].[CLI]) AND @OrganisationType = 'PLC') OR @OrganisationType = 'LTD') AND [U].[Date] IS NOT NULL) AND @ContractDate < [U].[Date]) AND [U].[CTPS] = 1) THEN 'No' 
       WHEN ((((((@LineNumber = [U].[CLI]) AND @OrganisationType != 'PLC') OR @OrganisationType != 'LTD') AND [U].[Date] IS NOT NULL) AND @ContractDate < [U].[Date]) AND [U].[CTPS] = 0) THEN 'No' 
       WHEN ((((((@LineNumber = [U].[CLI]) AND @OrganisationType != 'PLC') OR @OrganisationType != 'LTD') AND [U].[Date] IS NOT NULL) AND @ContractDate < [U].[Date]) AND [U].[CTPS] = 1) THEN 'No' 
       WHEN ((((((@LineNumber = [U].[CLI]) AND @OrganisationType = 'PLC') OR @OrganisationType = 'LTD') AND [U].[Date] IS NOT NULL) AND @ContractDate > [U].[Date]) AND [U].[CTPS] = 0) THEN 'No' 
       WHEN ((((((@LineNumber = [U].[CLI]) AND @OrganisationType != 'PLC') OR @OrganisationType != 'LTD') AND [U].[Date] IS NOT NULL) AND @ContractDate > [U].[Date]) AND [U].[CTPS] = 1) THEN 'Yes' 
       WHEN ((((((@LineNumber = [U].[CLI]) AND @OrganisationType != 'PLC') OR @OrganisationType != 'LTD') AND [U].[Date] IS NOT NULL) AND @ContractDate > [U].[Date]) AND [U].[CTPS] = 0) THEN 'Yes' 
       END 


FROM [Contract] c 
INNER JOIN [Account] a 
     ON [c].[AccountFK] = [a].[AccountID] 
INNER JOIN [Profile] p 
     ON [p].[ProfileID] = [a].[ProfileFK] 
INNER JOIN [Line] l 
     ON [l].[ContractFK] = [ContractID] 
LEFT JOIN [Deal] d 
     ON [c].[ContractID] = [d].[ContractFK] 
INNER JOIN (  SELECT BranchTypeFK, BranchID, Name 
          FROM [Branch] b 
         )b 
     ON [d].[BranchFK] = [b].[BranchID] 
     AND BranchTypeFK IN (1,2,4) 
INNER JOIN [OrganisationType] o 
     ON [p].[OrganisationTypeFK] = [o].[OrganisationTypeID] 
LEFT JOIN [Lookup] U 
     ON U.CLI = l.LineNumber 
LEFT JOIN History H 
     ON h.CLI = l.LineNumber 

return @answer 

    -- Return the result of the function 


RETURN @Answer 
END 

    select top 100 [CORPORATE\HargreavesD].[TPS_Checker1](u.CLI ,c.ContractDate,o.Name) Answer 
FROM [Contract] c 
INNER JOIN [Account] a 
     ON [c].[AccountFK] = [a].[AccountID] 
INNER JOIN [Profile] p 
     ON [p].[ProfileID] = [a].[ProfileFK] 
INNER JOIN [Line] l 
     ON [l].[ContractFK] = [ContractID] 
LEFT JOIN [Deal] d 
     ON [c].[ContractID] = [d].[ContractFK] 
INNER JOIN (  SELECT BranchTypeFK, BranchID, Name 
          FROM [Branch] b 
         )b 
     ON [d].[BranchFK] = [b].[BranchID] 
     AND BranchTypeFK IN (1,2,4) 
INNER JOIN [OrganisationType] o 
     ON [p].[OrganisationTypeFK] = [o].[OrganisationTypeID] 
LEFT JOIN [Lookup] U 
     ON U.CLI = l.LineNumber 
LEFT JOIN History H 
     ON h.CLI = l.LineNumber 

這是一個朋友建議我第一次嘗試而不是在一個功能

DECLARE @StartDate DATE = '01/04/2013' 
DECLARE @EndDate DATE = '30/04/2013' 

SELECT ContractID 
     ,LineNumber 
     ,ContractDate 
     ,[Date] 
     ,o.Name 
     ,u.[File] 
     ,DateAdded 
     ,DateRemoved 
     ,u.CTPS 
     ,B.Name [Branch Name] 

     END 
INTO [TPS] 
FROM [Contract] c 
INNER JOIN [Account] a 
    ON [c].[AccountFK] = [a].[AccountID] 
INNER JOIN [Profile] p 
    ON [p].[ProfileID] = [a].[ProfileFK] 
INNER JOIN [Line] l 
    ON [l].[ContractFK] = [ContractID] 
LEFT JOIN [Deal] d 
    ON [c].[ContractID] = [d].[ContractFK] 
INNER JOIN ( SELECT BranchTypeFK, BranchID, Name 
       FROM [Branch] b 
      )b 
    ON [d].[BranchFK] = [b].[BranchID] 
    AND BranchTypeFK IN (1,2,4) 
INNER JOIN [OrganisationType] o 
    ON [p].[OrganisationTypeFK] = [o].[OrganisationTypeID] 
LEFT JOIN (
      SELECT [CLI], [Date] [lDate], [Date], [CTPS], [File] = 'Lookup' 
      FROM [Lookup] tl 
      )u 
    ON u.CLI = l.LineNumber 
LEFT JOIN (
      SELECT [CLI], [DateAdded], [DateRemoved], [CTPS], [File] = 'History' 
      FROM History h 
      )h 
    ON h.CLI = l.LineNumber 
WHERE ContractDate BETWEEN @StartDate AND @EndDate 

SELECT * 
     ,[OnTPS] = CASE 
        WHEN ([Date] IS NOT NULL AND [ContractDate] < [Date]) THEN 'No' 
        WHEN ([Date] IS NOT NULL AND [ContractDate] > [Date]) THEN 'Yes' 

        WHEN ([Date] IS NULL AND [ContractDate] BETWEEN [DateAdded] AND [DateRemoved]) THEN 'Yes' 
        WHEN ([Date] IS NULL AND [ContractDate] NOT BETWEEN [DateAdded] AND [DateRemoved]) THEN 'No' 

        WHEN ([Date] IS NULL AND [ContractDate] BETWEEN [DateAdded] AND [DateRemoved] AND [Name] = 'PLC' OR [Name] = 'LTD' AND CTPS = 1) THEN 'Yes' 
        WHEN ([Date] IS NULL AND [ContractDate] BETWEEN [DateAdded] AND [DateRemoved] AND [Name] = 'PLC' OR [Name] = 'LTD' AND CTPS = 0) THEN 'No' 

        WHEN ([Date] IS NOT NULL AND [ContractDate] > [Date] AND [Name] = 'PLC' OR [Name] = 'LTD' AND CTPS = 1) THEN 'Yes' 
        WHEN ([Date] IS NOT NULL AND [ContractDate] > [Date] AND [Name] = 'PLC' OR [Name] = 'LTD' AND CTPS = 0) THEN 'No' 
        END 
FROM [Temp].[dbo].[TPS] t 

Answer 1

你的主要查詢可以稍作簡化，但仍給予同樣的結果（我認爲 - 沒有測試數據是相當棘手的告訴）：

SELECT @Answer = CASE 
      WHEN (@OrganisationType = 'PLC' OR @OrganisationType = 'LTD') AND @ContractDate < [U].[Date] AND [U].[CTPS] = 0 THEN 'No' 
      WHEN (@OrganisationType = 'PLC' OR @OrganisationType = 'LTD') AND @ContractDate < [U].[Date] AND [U].[CTPS] = 1 THEN 'No' 
      WHEN (@OrganisationType != 'PLC' OR @OrganisationType != 'LTD') AND @ContractDate < [U].[Date] AND [U].[CTPS] = 0 THEN 'No' 
      WHEN (@OrganisationType != 'PLC' OR @OrganisationType != 'LTD') AND @ContractDate < [U].[Date] AND [U].[CTPS] = 1 THEN 'No' 
      WHEN (@OrganisationType = 'PLC' OR @OrganisationType = 'LTD') AND @ContractDate > [U].[Date] AND [U].[CTPS] = 0 THEN 'No' 
      WHEN (@OrganisationType != 'PLC' OR @OrganisationType != 'LTD') AND @ContractDate > [U].[Date] AND [U].[CTPS] = 1 THEN 'Yes' 
      WHEN (@OrganisationType != 'PLC' OR @OrganisationType != 'LTD') AND @ContractDate > [U].[Date] AND [U].[CTPS] = 0 THEN 'Yes' 
     END 
    FROM [Contract] c 
     INNER JOIN [Account] a ON [c].[AccountFK] = [a].[AccountID] 
      INNER JOIN [Profile] p ON [p].[ProfileID] = [a].[ProfileFK] 
       INNER JOIN [OrganisationType] o ON [p].[OrganisationTypeFK] = [o].[OrganisationTypeID] 
     INNER JOIN [Line] l ON [l].[ContractFK] = [c].[ContractID] 
      INNER JOIN [Lookup] U ON U.CLI = l.LineNumber 
     LEFT JOIN [Deal] d ON [c].[ContractID] = [d].[ContractFK] 
      INNER JOIN [Branch] b ON [d].[BranchFK] = [b].[BranchID] AND BranchTypeFK IN (1,2,4) 
    WHERE [U].[CLI] = @LineNumber 
     AND [U].[Date] IS NOT NULL 

你還在你的函數的底返回@Answer兩次，並有在@Answer仍可能NULL的情況;這可能是故意的。除此之外，如果它滿足您的業務需求並以可接受的速度執行，那麼沒有真正的驅動程序來進一步重寫此功能。