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我有一个我正在处理的存储过程，它非常简单，但给了我一些奇怪的问题。基本上，如果客户在储蓄账户上提款超过 2 次，则每次后续提款都会收取 1.00 服务费。

问题是我好像减了一个，而且只收第4次及以后交易的服务费。

这是存储过程代码：

IF @AccountType = 'Savings' AND @Type = 'W'
    BEGIN
        SELECT @WithdrawCount = WithdrawalCount
        FROM Accounts
        WHERE AccountID = @AccountID

        IF @WithdrawCount > 2
        BEGIN
            SET @ServiceCharge = 1.00

            UPDATE Accounts SET Balance = Balance - @Amount - @ServiceCharge
            WHERE Balance > 0 AND AccountID = @AccountID

            UPDATE Accounts SET WithdrawalCount = WithdrawalCount + 1
            WHERE Balance > 0 AND AccountID = @AccountID

            INSERT INTO Transactions( AccountID, EmplNo, Amount, Description, EnteredBy, ServiceCharge, Type )
            VALUES( @AccountID, @EmplNo, @Amount, @Description, @EnteredBy, @ServiceCharge, @Type )

            SET @TransID = SCOPE_IDENTITY()
            PRINT @TransID
        END
        ELSE
        BEGIN
            SET @ServiceCharge = 0.00

            UPDATE Accounts SET Balance = Balance - @Amount - @ServiceCharge
            WHERE Balance > 0 AND AccountID = @AccountID

            UPDATE Accounts SET WithdrawalCount = WithdrawalCount + 1
            WHERE Balance > 0 AND AccountID = @AccountID

            INSERT INTO Transactions( AccountID, EmplNo, Amount, Description, EnteredBy, ServiceCharge, Type )
            VALUES( @AccountID, @EmplNo, @Amount, @Description, @EnteredBy, @ServiceCharge, @Type )

            SET @TransID = SCOPE_IDENTITY()
            PRINT @TransID
        END

        SELECT @WithdrawCount = WithdrawalCount
        FROM Accounts
        WHERE AccountID = @AccountID
    END

我还完成了版本，其中每个条件（> = 3，= 3，< 3）都有一个 if 块，但也没有成功。每次我制作一个不同的版本时，一旦提款计数达到 3 就应该跳闸，它不会。任何建议都会很棒。

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1 回答 1

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您正在检查您的提款计数，然后再增加它。即在第 3 次，withdrawCount 的值将是 2 而不是 3，直到您更新它。只需检查它是否大于 1 或先增加它

于 2013-10-15T23:37:58.343 回答