Question

因此，这是针对SSRS报告的，因此我使用了临时表。我有两个表，一个用于交易，我只是用它来提取账户和金额。第二个是摊销的拖欠信息，我试图根据交易进行调整，但我遇到了语法问题。案例陈述是否不允许与游标或更新一起使用？

--Example Transaction:Account 123456 Principal 500.00 Interest 250.00

delinquent 5 months of 200 principal each month, the transaction had  principal amount of 500, the first two are left alone, the third is reduced to 100 to match the total to the transaction amount, leaving a remaining amount of 0

--Delinquent data
-- 11/2015 Prin 200 Int 80 -> Prin 0   Int 0 (running total  Prin 500 Int 250)
-- 10/2015 Prin 200 Int 80 -> Prin 0   Int 10 (running total  Prin 500 Int 250)
--  9/2015 Prin 200 Int 80 -> Prin 100 Int 80 (running total  Prin 500 Int 240)
--  8/2015 Prin 200 Int 80 -> Prin 200 Int 80 (running total  Prin 400 Int 160)
--  7/2015 Prin 200 Int 80 -> Prin 200 Int 80 (running total  Prin 200 Int 80) <- process starts from the oldest and goes up.

这需要使用游标，因为我无法处理集合，因为它必须从最旧的行开始，调整，找到剩余的总数，然后继续调整下一行。如果达到交易金额，则将剩余的行清零。然后我将剩余的金额返回到交易表中。

Declare  TranCursor Cursor FORWARD_ONLY 
For Select LoanNumber, PrincipalCollected, InterestCollected, ServiceFee, PayoffPrincipal,PayoffInterest,PayoffServiceFee
From #transFinal 
FOR UPDATE OF PayoffPrincipal,PayoffInterest,PayoffServiceFee


Open TranCursor;
Fetch next from TranCursor into @TranLoan, @TranPrin, @TranInt, @TranServ, @POPrin,@POInt,@POServ
while (@@Fetch_status = 0) 
Begin
    --Process this individual loan's transaction by going through each set of amortized amounts starting with the oldest and reducing excess of transaction amounts to zero. 
    --eg. delinquent 3 months of 200 principal each month, the transaction had principal amount of 500, the first two are left alone, the third is reduced to 100 to match the total to the transaction amount
    --Transaction Principal 500 Interest 250
    --Delinquent data
    -- 11/2015 Prin 200 Int 80 -> Prin 0   Int 0 (running total  Prin 500 Int 250)
    -- 10/2015 Prin 200 Int 80 -> Prin 0   Int 10 (running total  Prin 500 Int 250)
    --  9/2015 Prin 200 Int 80 -> Prin 100 Int 80 (running total  Prin 500 Int 240)
    --  8/2015 Prin 200 Int 80 -> Prin 200 Int 80 (running total  Prin 400 Int 160)
    --  7/2015 Prin 200 Int 80 -> Prin 200 Int 80 (running total  Prin 200 Int 80) <- process starts from the oldest and goes up.
    Declare  DelqCursor  CURSOR FORWARD_ONLY 
    FOR select LoanNumber,DelqPrin ,DelqInt  ,DelqServFee from #dq 
        where LoanNumber = @TranLoan
        Order by PaidToDate Asc
        For update OF DelqPrin, DelqInt, DelqServFee;
        Open DelqCursor;
-----------------------------------------------------------------------------------------------------------
-- Processing individual row of delinquent data
-----------------------------------------------------------------------------------------------------------
Fetch next from DelqCursor into  @DelqPrin, @DelqInt, @DelqServ, @DelqPTD --, @POPrin,@POInt,@POServ
while (@@Fetch_status = 0) 
    BEGIN


            CASE when @TranPrin = 0 then set @DelqPrin = 0 -- Syntax error on case
                WHEN @TranPrin >0 and @TranPrin > @DelqPrin then -- Syntax error on when
                    set @TranPrin = @TranPrin - @DelqPrin
                    set @ColPrin = @ColPrin + @DelqPrin
                WHEN @TranPrin >0 and @TranPrin < @DelqPrin then 
                    set @ColPrin = @ColPrin + @TranPrin
                    set @TranPrin = 0 
                    set @DelqPrin = @DelqPrin -@TranPrin
            end

            CASE when @TranInt = 0 then set @DelqInt = 0
                WHEN @TranInt >0 and @TranInt > @DelqInt then 
                    set @TranInt = @TranInt - @DelqInt
                    set @ColInt = ColInt + @DelqInt
                WHEN  @TranInt >0 and @TranInt < @DelqInt then 
                    set @ColInt = @ColInt + @TranInt
                    set @TranInt = 0 
                    set @DelqInt = @DelqInt -@TranInt
            end

            CASE when @TranServ = 0 then set @DelqServFee = 0
                WHEN  @TranServ >0 and @TranServ> @DelqServ then 
                    set @TranServ = @TranServ - @DelqServ
                    set @ColServ = ColServ + @DelqServ
                WHEN  @TranServ >0 and @TranServ < @DelqServ then 
                    set @ColServ = @ColServ + @TranServ
                    set @TranServ = 0 
                    set @DelqServ = @DelqServ -@TranServ
            end

Fetch next from DelqCursor into  @DelqPrin, @DelqInt, @DelqServ, @DelqPTD 
End
-----------------------------------------------------------------------------------
--All rows of delinquent data for a single loan have been processed. Now we update the Payoff columns
----------------------------------------------------------------------------------
Set @PoPrin =  @ColPrin
Set @PoInt =  @ColInt
Set @PoServ =  @ColServ
--Todo Finish update statement for outside loop to update transaction table
Close DelqCursor-- Finished with delinquent data for this loan. We close the cursor
Fetch next from TranCursor into @TranLoan, @TranPrin, @TranInt, @TranServ, @POPrin,@POInt,@POServ --Start Processing next loan
End 

Close TranCursor
deallocate DelqCursor
deallocate TranCursor

我很感激任何见解，我可以弄清楚为什么我的案子在陈述时给我错误。我在msdn语法中看不到任何会阻止案例逻辑工作的东西。

Answer 1

您编写CASE语句的方式无效。案例逻辑需要在SELECT或SET内完成。你的在那里，而SET位于THEN之后的中间。

您需要为代码中的每个CASE更改逻辑。

IF @TranPrin = 0 
    SET @DelqPrin = 0 

IF @TranPrin >0 AND @TranPrin > @DelqPrin
BEGIN
    SET @TranPrin = @TranPrin - @DelqPrin
    SET @ColPrin = @ColPrin + @DelqPrin
END

IF @TranPrin > 0 AND @TranPrin < @DelqPrin
BEGIN
    SET @ColPrin = @ColPrin + @TranPrin
    SET @TranPrin = 0 
    SET @DelqPrin = @DelqPrin -@TranPrin
END

CASE (Transact SQL) Reference

基于嵌套游标的更新

1 个答案: