Question

我正在尝试创建一个存储过程，它将接受一个表值参数，然后使用merge来添加新记录，保留已存在的那些并删除已存在但尚未提供的记录，这就是我想要的，

Alter procedure [dbo].[InsertMultipleFruits]
(
    @FruitCrates As Fruits_CratesType READONLY
)
AS

GO
DECLARE @I INT;

BEGIN
    MERGE INTO Fruits_Crates AS TARGET
    USING(SELECT FruitID, CrateID FROM @FruitCrates) AS SOURCE
        ON (TARGET.FruitID = SOURCE.FruitID)
    WHEN MATCHED THEN
        UPDATE 
            SET @I = 1  --- i want nothing to happen here ---
    WHEN NOT MATCHED BY TARGET THEN
        INSERT (FruitID, CrateID)
        VALUES (SOURCE.FruitID, SOURCE.CrateID)
    WHEN NOT MATCHED BY SOURCE THEN
        DELETE;
END

我收到错误，

...第5行必须声明表变量＆＃34; @ FruitCrates＆＃34;。信息156，第15级，状态1，第10行关键字＆＃39; WHEN＆＃39;附近的语法不正确。

我已经创建了表类型，但不确定为什么会出错。

Answer 1

不要在程序声明和正文之间放置go。试试这个：

Alter procedure [dbo].[InsertMultipleFruits]
(
    @FruitCrates As Fruits_CratesType READONLY
)
AS
BEGIN
    DECLARE @I INT;
    MERGE INTO Fruits_Crates AS TARGET
    USING(SELECT FruitID, CrateID FROM @FruitCrates) AS SOURCE
        ON (TARGET.FruitID = SOURCE.FruitID)
    WHEN MATCHED THEN
        UPDATE 
            SET @I = 1  --- i want nothing to happen here ---
    WHEN NOT MATCHED BY TARGET THEN
        INSERT (FruitID, CrateID)
        VALUES (SOURCE.FruitID, SOURCE.CrateID)
    WHEN NOT MATCHED BY SOURCE THEN
        DELETE;
END;

必须声明表变量＆＃34; @ FruitCrates＆＃34;

1 个答案: