where 子句中的 case 语句 - SQL Server 2008

Question

SELECT  
   PDADate, T.Merchandizer_ID, T.Merchandizer, Merchandizer_LoginName, 
   STORE_ID, STORE_CODE, STORE_NAME,
   ACCOUNT_ID, ACCOUNT_NAME, Account_Store_Format_Id, Account_Store_Format,
   StoreType_Id, StoreType, T.Listid, T.Listname, 
   T.TimeIn, T.TimeOut, T.PlannedDate, T.Reason, TaskCode, TotalTime 
FROM 
   [dbo].Report_RD_Coverage T 
INNER JOIN 
   #TempLocationH TL ON TL.LocationId=T.Location_Id
WHERE 
   CONVERT(Date, PDADate) Between (@Start_Date) AND Isnull(@End_Date, @CurrentDate)
   AND T.Account_Id IN 
       (SELECT 
            CASE WHEN @Account_Id IS NULL THEN T.Account_Id 
                 ELSE (SELECT * FROM UDF_SplitString(@Account_Id,',')) 
            END
       )    
   AND T.StoreType_Id IN 
       (SELECT 
            CASE WHEN @StoreType_Id IS NULL THEN T.StoreType_Id 
                   ELSE (SELECT * FROM UDF_SplitString(@StoreType_Id,',')) 
            END
       )
  AND T.Store_Id IN
      (SELECT 
           CASE WHEN @Store_Id IS NULL THEN T.Store_Id 
                  ELSE (SELECT * FROM UDF_SplitString(@Store_Id,',')) 
           END
      )

如果@Account_Id、@StoreType_Id 和@Store_Id 为空，则应选择所有ACCOUNT_ID、STORETYPE_ID 和STORE_ID，否则应根据参数值进行过滤。

UDF_SplitString是分割逗号分隔字符串的函数，它的返回值是一个像这样的表格：

 - 1
 - 2
 - 3

我收到此错误：

子查询返回超过 1 个值。当子查询跟随 =、!=、、>= 或子查询用作表达式时，这是不允许的。

Answer 1

CASE 必须返回一个标量值，所以试试这个变体：

select PDADate, T.Merchandizer_ID, T.Merchandizer, Merchandizer_LoginName, STORE_ID, STORE_CODE, 
    STORE_NAME, ACCOUNT_ID, ACCOUNT_NAME, Account_Store_Format_Id, Account_Store_Format, 
    StoreType_Id, StoreType, T.Listid, T.Listname, T.TimeIn, T.TimeOut, T.PlannedDate, 
    T.Reason, TaskCode, TotalTime
from [dbo].Report_RD_Coverage T
inner join #TempLocationH TL on TL.LocationId = T.Location_Id
where CONVERT(date, PDADate) between (@Start_Date)
        and Isnull(@End_Date, @CurrentDate)
    and (
        @Account_Id is null
        or T.Account_Id in (
            select *
            from UDF_SplitString(@Account_Id, ',')
            )
        )
    and (
        @StoreType_Id is null
        or T.StoreType_Id in (
            select *
            from UDF_SplitString(@StoreType_Id, ',')
            )
        )
    and (
        @Store_Id is null
        or T.Store_Id in (
            select *
            from UDF_SplitString(@Store_Id, ',')
            ) end
        )

Answer 2

我试过这个并且非常接近，但你必须从我找到的链接中做一些事情。 这是我的尝试。您唯一需要构建的是@udf 数据。

declare @Store_Id INT;
declare @Account_Id INT;
DECLARE @UDF[9] OF VARCHAR(30);
set @Store_Id = 99 --NULL  
set @Account_Id = 15  
SET @UDF = '11,12,13,14,15,16'

SELECT @Account_Id AS ACID
WHERE CAST(@Account_Id AS VARCHAR(6)) IN (
   CASE WHEN @Store_Id IS NULL THEN CAST(@Account_Id AS VARCHAR(6)) 
   ELSE @UDF  END 

链接在 http://www.codeproject.com/Questions/473174/CreateplusArrayplusinplusSqlplusServer

DECLARE @INSTR as VARCHAR(MAX)
SET @INSTR = '2,3,177,'
DECLARE @SEPERATOR as VARCHAR(1)
DECLARE @SP INT
DECLARE @VALUE VARCHAR(1000)
SET @SEPERATOR = ','
CREATE TABLE #tempTab (id int not null)
WHILE PATINDEX('%' + @SEPERATOR + '%', @INSTR ) <> 0 
BEGIN
   SELECT  @SP = PATINDEX('%' + @SEPERATOR + '%',@INSTR)
   SELECT  @VALUE = LEFT(@INSTR , @SP - 1)
   SELECT  @INSTR = STUFF(@INSTR, 1, @SP, '')
   INSERT INTO #tempTab (id) VALUES (@VALUE)
END
SELECT * FROM myTable WHERE id IN **(SELECT id FROM #tempTab)**
DROP TABLE #tempTab

你可以提取粗体的sql和如何创建临时表及其数据的逻辑，我希望你能得到你想要的。

Answer 3

>这是我正确的解决方案........现在它可以正常工作了

CREATE TABLE #Store_Id (StoreID varchar(20))

    IF @Store_Id != '0'
    BEGIN 
        INSERT INTO #Store_Id
        SELECT data FROM UDF_SplitString(@Store_Id,',')     
    END
    ELSE
        BEGIN
            INSERT INTO #Store_Id
            SELECT '0'
    END

CREATE TABLE #StoreType_Id (StoreTypeID varchar(20))

    IF @StoreType_Id != '0'
    BEGIN 
        INSERT INTO #StoreType_Id
        SELECT data FROM UDF_SplitString(@StoreType_Id,',')     
    END
    ELSE
        BEGIN
            INSERT INTO #StoreType_Id
            SELECT '0'
    END 

CREATE TABLE #Account_Id (AccountID varchar(20))

    IF @Account_Id != '0'
    BEGIN 
        INSERT INTO #Account_Id
        SELECT data FROM UDF_SplitString(@Account_Id,',')       
    END
    ELSE
        BEGIN
            INSERT INTO #Account_Id
            SELECT '0'
    END     

INSERT INTO #FinalTable(VisitDate,Merchandizer_Id,Merchandizer,MerchandizerLogin,StoreId,StoreCode,StoreName,AccountId,AccountName,
    Account_Store_Format_Id,Account_Store_Format,StoreTypeId ,StoreType ,ListId ,ListName,TimeIn ,TimeOut,PlannedDate ,Reason ,TaskCode,TotalTime)      

SELECT  Visit_Date,T.Merchandizer_ID,T.Merchandizer,Merchandizer_LoginName,STORE_ID,STORE_CODE,STORE_NAME,ACCOUNT_ID,ACCOUNT_NAME,
        Account_Store_Format_Id,Account_Store_Format,StoreType_Id, 
        StoreType,T.Listid,T.Listname,T.TimeIn,T.TimeOut,T.PlannedDate,T.Reason,TaskCode,TotalTime 
FROM [dbo].Report_RD_Coverage T
INNER JOIN #TempLocationH TL ON TL.LocationId=T.Location_Id
INNER JOIN #Store_Id on CONVERT(VARCHAR,t.Store_Id) = CASE WHEN @Store_Id = '0' THEN convert(VARCHAR,t.Store_Id) ELSE StoreID END
INNER JOIN #StoreType_Id on CONVERT(VARCHAR,t.StoreType_Id) = CASE WHEN @StoreType_Id = '0' THEN convert(VARCHAR,t.StoreType_Id) ELSE StoreTypeID END
INNER JOIN #Account_Id on CONVERT(VARCHAR,t.Account_Id) = CASE WHEN @Account_Id = '0' THEN convert(VARCHAR,t.Account_Id) ELSE AccountID END

WHERE CONVERT(Date,PDADate) Between @Start_Date AND @End_Date