Question

我正在尝试创建如下基本存储过程：

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[spUpdate1]
    @registration_id NCHAR(8),
    @registration_status INT
AS
BEGIN
    UPDATE dbo.Test1
    SET Registration_Status = @registration_status
    WHERE Registration_id = @registration_id;
END

此存储过程可以正常工作，但是registration_id不是我想要传递的参数。

我的表中有三列：

Reference_Number, Registration_id, Registration_Status

我希望能够传递Reference_Number作为参数，该语句从此处从表的相关行中选择registration_id，然后将其传递给update语句以执行更新

Answer 1

这就是您想要的吗？基于Reference_Number获得Registration_id吗？

ALTER PROC [dbo].[spUpdate1]

 @registration_id nchar(8),
 @registration_status int,
 @Reference_Number nchar(8)   -- added this

AS

BEGIN

    update t2
    set    Registration_Status = @registration_status 
    from   dbo.Test1 t1
           inner join dbo.Test1 t2 on t1.Registration_id = t2.Registration_id 
    where  t1.Reference_Number  = @Reference_Number 

END

Answer 2

根据您的评论，您可以执行此操作；

ALTER PROC [dbo].[spUpdate1]    
 @registration_status int,
 @reference_number nvarchar(max)      
AS    
BEGIN    
    UPDATE t1
    SET    registration_status = @registration_status 
    FROM   dbo.Test1 t1
    WHERE  CAST(t1.reference_number as NVARCHAR(MAX)) = @reference_number     
END

尽管我建议将Reference_Number的数据类型更改为nvarchar（max）而不是文本...

更新SQL Server存储过程-切换参数中的列

2 个答案: