返回NEWSEQUENTIALID()作为输出参数

Question

想象一下这样一个表：

CREATE TABLE [dbo].[test](
     [id] [uniqueidentifier] NULL,
     [name] [varchar](50) NULL
)

GO

ALTER TABLE [dbo].[test] ADD  CONSTRAINT [DF_test_id]  DEFAULT (newsequentialid()) FOR [id]
GO

使用如下所示的INSERT存储过程：

CREATE PROCEDURE [Insert_test]
    @name as varchar(50),
    @id as uniqueidentifier OUTPUT
AS
BEGIN
    INSERT INTO test(
        name
    )
    VALUES(
        @name
    )
END

获取刚插入的GUID并将其作为输出参数返回的最佳方法是什么？

Answer 1

使用Insert语句的Output子句。

CREATE PROCEDURE [Insert_test]
    @name as varchar(50),
    @id as uniqueidentifier OUTPUT
AS
BEGIN
    declare @returnid table (id uniqueidentifier)

    INSERT INTO test(
        name
    )
    output inserted.id into @returnid
    VALUES(
        @name
    )

    select @id = r.id from @returnid r
END
GO

/* Test the Procedure */
declare @myid uniqueidentifier
exec insert_test 'dummy', @myid output
select @myid

Answer 2

试一试

SELECT @ID = ID FROM Test WHERE Name = @Name

(如果名称具有唯一约束)