DECLARE @Out Int (get value out of a procedure) : Declare « Transact SQL « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Transact SQL » Declare 
20. 1. 6. DECLARE @Out Int (get value out of a procedure)
6CREATE TABLE Product(
7>     ProductID               int                NOT NULL,
8>     Name                    nvarchar(25)       NOT NULL,
9>     ProductNumber           nvarchar(25)               ,
10>      Color                   nvarchar(15)       NULL,
11>      StandardCost            money              NOT NULL,
12>      Size                    nvarchar(5)        NULL,
13>      Weight                  decimal(82)      NULL,
14>      ProductLine             nchar(20)           NULL,
15>      SellStartDate           datetime           NOT NULL,
16>      SellEndDate             datetime           NULL
17>  )
18>  GO
1insert into Product values(1,'Product A', '1','Red',123.123,'1',1,'ProductLine A','1999-03-22','2000-03-22');
2> GO

(rows affected)
1>
2>
3insert into Product values(2,'Product B', '2','Yellow',234.234,'1',3,'ProductLine B','2000-03-22','2001-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(3,'Product C', '3','Pink',345.345,'1',3,'ProductLine V','2001-09-22','2006-02-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(4,'Product D', '4','White',456.456,'1',4,'ProductLine D','2002-08-22','2006-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(5,'Product E', '5','Black',567.567,'1',5,'ProductLine E','2003-01-22','2003-04-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(6,'Product F', '6','Blue',678.678,'1',6,'ProductLine W','2004-02-22','2005-05-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(7,'Product G', '7','Drak',789.789,'1',7,'ProductLine Q','2005-03-22','2006-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(8,'Product H', '8','Gray',234.123,'1',8,'ProductLine F','2006-04-22','2006-09-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(9,'Product I', '9','Red',543.123,'1',9,'ProductLine R','2007-05-22','2008-03-22');
4> GO

(rows affected)
1>
2>
3insert into Product values(0,'Product J', '0','Gold',765.123,'1',0,'ProductLine J','2008-06-22','2009-03-22');
4> GO

(rows affected)
1>
2>
3>
4>
5>
6CREATE PROCEDURE spProductCountBySubCategory
7>  @SubID Int,
8>  @ProdCount Int OUTPUT
9> AS
10>  SELECT @ProdCount = COUNT(*)
11>  FROM Product
12>   WHERE ProductID = @SubID
13>  GO
1>
2> DECLARE @Out Int
3>
4>   EXECUTE spProductCountBySubCategory
5> @SubID = 2,
6> @ProdCount = @Out
7>
8>
9SELECT @Out AS ProductCountBySubCategory
10>  GO
ProductCountBySubCategory
-------------------------
                     NULL

(rows affected)
1>
2> drop PROCEDURE spProductCountBySubCategory;
3> GO
1>
2>
3> drop table Product;
4> GO
1>
20. 1. Declare
20. 1. 1. The DECLARE statement has a pretty simple syntax:
20. 1. 2. It is possible to define several variables in a single Declare statement.
20. 1. 3. The names of variables must begin with @
20. 1. 4. Simple SELECT query written using variables for field names.
20. 1. 5. Declare a table type variable and query it
20. 1. 6. DECLARE @Out Int (get value out of a procedure)
20. 1. 7. DECLARE @Out Int
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