如何使用 SCOPE_IDENTITY 检索最后插入的 ID [英] How to use SCOPE_IDENTITY to retrieve the last ID that was inserted

问题描述

假设我有两张桌子.第一个表的主键是另一个表的外键.

Suppose I have two table. First table's primary key is the foreign key for another table.

表Member 在Member_detail 中有它的主键作为外键.

Table Member has its primary key as the foreign key in Member_detail.

因此，当我使用存储过程在 Member 表中插入一行时，我需要获取要添加到 Member_detail 表的主键值.

So when I insert a row in Member table using a Stored Procedure, I need to get the primary key value to add to the Member_detail table.

我使用的一种方法是:

SELECT Max(MemberID) 
FROM Member

然后将此 Memberid 传递到我的 Member_detail 表，但在 以下帖子，我读到不推荐使用 Max 函数，我应该使用 SCOPE_IDENTITY，但我不知道如何使用它.

Then passing this Memberid to my Member_detail table, but on the following post, I read that the Max function is not recommended and that I should use SCOPE_IDENTITY, but I don't know how to use of it.

谁能给我举个例子?

推荐答案

SCOPE_IDENTITY 返回插入到同一范围内的标识列中的最后一个标识值.

SCOPE_IDENTITY returns the last identity value inserted into an identity column in the same scope.

假设您有 2 张桌子:

Given you have 2 tables:

Member: id int (primaryKey), name varchar

Member_Detail: id int (primaryKey), pk int (foreignKey), name varchar

你可以这样做:

DECLARE @MemberId int

INSERT INTO Member (name) VALUES ('hello');

SET @MemberId = SCOPE_IDENTITY()

INSERT INTO Member_Detail (pk, name) VALUES (@MemberId, 'hello again')

MSDN 参考:

返回插入到同一范围内的标识列中的最后一个标识值.作用域是一个模块:存储过程、触发器、函数或批处理.因此，如果两个语句在同一个存储过程、函数或批处理中，则它们在同一范围内.

Returns the last identity value inserted into an identity column in the same scope. A scope is a module: a stored procedure, trigger, function, or batch. Therefore, two statements are in the same scope if they are in the same stored procedure, function, or batch.

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