我正在尝试添加两个变量
DECLARE @RentsSum MONEY
SET @RentsSum = (SELECT SUM(Price)
FROM Rents
WHERE StartDate IS NOT NULL)
GO
DECLARE @SalesSum MONEY
SET @PriceSum = (SELECT SUM(Price)
FROM Purchases
WHERE DateBought IS NOT NULL)
GO
DECLARE @SalesAndRentsSum MONEY
SET @SalesAndRentsSum = @RentsSum + @PriceSum;
SELECT @SalesAndRentsSum
合而为一，但我在这里遇到一些奇怪的错误...
必须声明标量变量“ @PriceSum”。
必须声明标量变量“ @RentsSum”。
删除所有GO单词。您在此处有三个单独的批次，并且必须在该批次的范围内声明变量。
DECLARE @RentsSum MONEY, @SalesSum MONEY, @SalesAndRentsSum MONEY
SET @RentsSum = (SELECT SUM(Price)
FROM Rents
WHERE StartDate IS NOT NULL)
SET @SalesSum = (SELECT SUM(Price)
FROM Purchases
WHERE DateBought IS NOT NULL)
SET @SalesAndRentsSum = @SalesSum + @PriceSum
SELECT @SalesAndRentsSum
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