存储过程参数默认值 [英] Stored procedure parameter default value

问题描述

我正在尝试使用默认参数创建一个存储过程，在我的查询中我会这样做:

I'm trying to create a stored procedure with default parameters, in my query I would do it like this:

DECLARE @mydate DATETIME
DECLARE @MT DATETIME
DECLARE @MY DATETIME
SELECT @mydate = GETDATE()
SELECT @MT = DATEPART(MONTH,@mydate)
SELECT @MY =  DATEPART(YEAR,@mydate)

SELECT * FROM ....

在我的存储过程中，我按如下方式尝试过，但是当我执行存储过程时，它提示我输入参数值:

In my stored proc I've tried it as follows but when I execute the stored proc it prompts me for parameter values:

USE ..
GO
..
ALTER PROCEDURE ...
(@mydate DATETIME
,@MT DATETIME
,@MY DATETIME)

AS
BEGIN ...
SELECT @mydate = GETDATE()
SELECT @MT = DATEPART(MONTH,@mydate)
SELECT @MY =  DATEPART(YEAR,@mydate)
---
SELECT * FROM ....

如何像在查询中一样在存储过程中设置参数值?

How do I set the parameter values in the stored proc like I would in the query?

推荐答案

试试这个..

我只放了一个参数，因为其他参数都依赖它.

I put only one parameter because the others depend on it.

第一种方法

USE ..
GO
..
ALTER PROCEDURE yourSP
(@mydateParam DATETIME)

AS
BEGIN ...
SELECT @mydate = @mydateParam
SELECT @MT = DATEPART(MONTH,@mydate)
SELECT @MY =  DATEPART(YEAR,@mydate)
  ---
SELECT * FROM ....

呼叫 SP:

DECLARE @mydateParam DATETIME
SELECT @mydateParam = GETDATE()
execute yourSP @mydateParam

第二种方法

ALTER Procedure yourSP
@mydateParam datetime = null
AS
BEGIN ...
IF @mydateParam is null
SET @mydateParam = getdate()
SELECT @mydate = @mydateParam
SELECT @MT = DATEPART(MONTH,@mydate)
SELECT @MY =  DATEPART(YEAR,@mydate)

   ---
SELECT * FROM ....

呼叫 SP:

DECLARE @mydateParam DATETIME
SELECT @mydateParam = GETDATE()
execute yourSP @mydateParam

或

execute yourSP

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