How to declare a variable in SQL Server and use it in the same Stored Procedure

可紊 提交于 2019-12-03 08:06:32

问题


Im trying to get the value from BrandID in one table and add it to another table. But I can't get it to work. Anybody know how to do it right?

CREATE PROCEDURE AddBrand
AS

DECLARE 
@BrandName nvarchar(50),
@CategoryID int,
@BrandID int

SELECT @BrandID = BrandID FROM tblBrand 
WHERE BrandName = @BrandName

INSERT INTO tblBrandinCategory (CategoryID, BrandID) 
       VALUES (@CategoryID, @BrandID) 

RETURN

回答1:


What's going wrong with what you have? What error do you get, or what result do or don't you get that doesn't match your expectations?

I can see the following issues with that SP, which may or may not relate to your problem:

  • You have an extraneous ) after @BrandName in your SELECT (at the end)
  • You're not setting @CategoryID or @BrandName to anything anywhere (they're local variables, but you don't assign values to them)

Edit Responding to your comment: The error is telling you that you haven't declared any parameters for the SP (and you haven't), but you called it with parameters. Based on your reply about @CategoryID, I'm guessing you wanted it to be a parameter rather than a local variable. Try this:

CREATE PROCEDURE AddBrand
   @BrandName nvarchar(50),
   @CategoryID int
AS
BEGIN
   DECLARE @BrandID int

   SELECT @BrandID = BrandID FROM tblBrand WHERE BrandName = @BrandName

   INSERT INTO tblBrandinCategory (CategoryID, BrandID) VALUES (@CategoryID, @BrandID)
END

You would then call this like this:

EXEC AddBrand 'Gucci', 23

...assuming the brand name was 'Gucci' and category ID was 23.




回答2:


In sql 2012 (and maybe as far back as 2005), you should do this:

EXEC AddBrand @BrandName = 'Gucci', @CategoryId = 23



回答3:


None of the above methods worked for me so i'm posting the way i did

DELIMITER $$
CREATE PROCEDURE AddBrand()
BEGIN 

DECLARE BrandName varchar(50);
DECLARE CategoryID,BrandID  int;
SELECT BrandID = BrandID FROM tblBrand 
WHERE BrandName = BrandName;

INSERT INTO tblBrandinCategory (CategoryID, BrandID) 
       VALUES (CategoryID, BrandID);
END$$



回答4:


CREATE PROCEDURE AddBrand
@BrandName nvarchar(50) = null,
@CategoryID int = null
AS    
BEGIN

DECLARE @BrandID int = null
SELECT @BrandID = BrandID FROM tblBrand 
WHERE BrandName = @BrandName

INSERT INTO tblBrandinCategory (CategoryID, BrandID) 
       VALUES (@CategoryID, @BrandID)

END

EXEC AddBrand @BrandName = 'BMW', @CategoryId = 1


来源:https://stackoverflow.com/questions/2793379/how-to-declare-a-variable-in-sql-server-and-use-it-in-the-same-stored-procedure

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