在SQL中，如何根據另一列中的字符串值對一列中的數值求和

Question

我希望我的程序按PlantName返回AcceptedProducts的PlantName 。

有人可以幫我糾正我的程序嗎？

CREATE PROCEDURE spAcceptedByCountry @Year INT, @Month INT
AS
    SELECT      CountryCode,
                CountryName,
                REPLACE(SUBSTRING([PlantName], CHARINDEX('-', [PlantName]), LEN([PlantName])), '-', '') AS [PlantName],
                SUM(AcceptedProducts) AS AcceptedProducts 
    FROM        vAcceptedByCountry
    WHERE       YEAR(DateOfManufacture) = @Year AND MONTH(DateOfManufacture) = @Month
    GROUP BY    CountryCode,
                CountryName,
                PlantName,
                AcceptedProducts
    ORDER BY    CountryCode;
GO

感謝您的幫助。 親切的問候。

Answer 1

嘗試這個：

CREATE PROCEDURE spAcceptedByCountry @Year INT, @Month INT
AS
    SELECT      CountryCode,
                CountryName,
                REPLACE(SUBSTRING([PlantName], CHARINDEX('-', [PlantName]), LEN([PlantName])), '-', '') AS [PlantName],
                SUM(AcceptedProducts) AS AcceptedProducts 
    FROM        vAcceptedByCountry
    WHERE       YEAR(DateOfManufacture) = @Year AND MONTH(DateOfManufacture) = @Month
    GROUP BY   1, 2, 3
    ORDER BY    CountryCode;
GO

您不想按您嘗試計算的聚合進行分組。

因此，現在您正在計算每個國家/地區代碼/國家/地區名稱/植物名稱的可接受產品，其中植物名稱不是列，而是選擇子句中的項目。