通過SQL光標更新和計算值

Question

我有兩列（TSD_BALANCEUNITS和TSD_UNITSINCERT）。 TSD_BALANCEUNITS有數值和TSD_UNITSINCERT有0.00

通過使用光標我想的TSD_BALANCEUNITS值更新到TSD_UNITSINCERT直到TSD_BALANCEUNITS更新值來TSD_UNITSINCERT總和等於到199.00

和的值正在更新的TSD_BALANCEUNITS變爲0.00並且移動到TSD_UNITSINCERT當移動值的總和等於199.00

下面是我使用的腳本...

 DECLARE @cnt INT = 0; 
     DECLARE @TSD_BALANCEUNITS AS DECIMAL(25, 4) 
     DECLARE @TSD_UNITSINCERT AS DECIMAL(25, 4) 
     DECLARE @CHECKFLAG AS DECIMAL(25, 4) 
     DECLARE LOCK_CERT_UNITS CURSOR LOCAL STATIC 
     FOR 

     SELECT TSD_BALANCEUNITS 
      ,TSD_UNITSINCERT 
     FROM IS_TRX_TRX_PROCESSED 
     WHERE (TSD_ACCCODE = 8775) 
      AND TSD_BALANCEUNITS > 0 
     ORDER BY TSD_REALIZEDDATE ASC 


     OPEN LOCK_CERT_UNITS 

     FETCH NEXT 
     FROM LOCK_CERT_UNITS 
     INTO @TSD_BALANCEUNITS 
      ,@TSD_UNITSINCERT 

     WHILE @@FETCH_STATUS = 0 --AND @cnt < 199.00 
     BEGIN 
      SET @TSD_UNITSINCERT = @TSD_BALANCEUNITS 
      SET @CHECKFLAG = + @TSD_BALANCEUNITS 

      IF (SUM(@CHECKFLAG) <= 199.00) 
      BEGIN 
       UPDATE IS_TRX_TRX_PROCESSED 
       SET TSD_UNITSINCERT = TSD_BALANCEUNITS 
       WHERE (TSD_ACCCODE = 8775) 
        AND TSD_BALANCEUNITS > 0 
      END 

      PRINT 'BALANCE UNIT =' + CONVERT(VARCHAR(50), @TSD_BALANCEUNITS) + ' ==> ' + 'CERT IN UNITS =' + CONVERT(VARCHAR(50), @TSD_UNITSINCERT); 

      FETCH NEXT 
      FROM LOCK_CERT_UNITS 
      INTO @TSD_BALANCEUNITS 
       ,@TSD_UNITSINCERT 
     END 

     CLOSE LOCK_CERT_UNITS 

     DEALLOCATE LOCK_CERT_UNITS 
     GO 

Answer 1

此命令：

UPDATE IS_TRX_TRX_PROCESSED 
SET TSD_UNITSINCERT = TSD_BALANCEUNITS 
WHERE (TSD_ACCCODE = 8775) 
AND TSD_BALANCEUNITS > 0 

更新TSD_ACCCODE = 8775和TSD_BALANCEUNITS> 0的所有記錄，它不會如果它的總和爲999，那麼你需要以某種方式識別哪些記錄必須更新。

其次，根據結果，這從來沒有發生。這意味着IF (SUM(@CHECKFLAG) <= 199.00)永遠不會是真的。我想，因爲你永遠不初始化值設置爲0

SET @CHECKFLAG = 0;