Answers for "what is stored procedure sql"

sql server stored procedure

CREATE PROCEDURE spGetEmployeeCountByGender
@Gender nvarchar(20),
@EmployeeCount int Output
AS
BEGIN
SELECT @EmployeeCount = COUNT(Id) 
FROM tblEmployee 
WHERE Gender = @Gender
END

Explain the Stored Procedure

Stored Procedure :
A stored procedure is a prepared SQL code that you can save, 
so the code can be reused over and over again.

So if you have an SQL query that you write over and over again, 
save it as a stored procedure, and then just call it to execute it.

You can also pass parameters to a stored procedure, 
so that the stored procedure can act based on the parameter value(s) 
that is passed.

what is procedure in sql

-Stored procedure is a group of SQL
statements that has been created 
and stored in the database.
-A stored procedure will accept input 
parameters so that a single procedure
can be used over the network by several
clients using different input data.
-A stored procedures will reduce
network traffic and increase the performance. 
If we modify a stored procedure all the
clients will get the updated stored procedure.

Sample of creating a stored procedure
CREATE PROCEDURE test_display AS
SELECT FirstName, LastName FROM tb_test
EXEC test_display

create proc

IF OBJECT_ID ( 'Production.uspGetList', 'P' ) IS NOT NULL   
    DROP PROCEDURE Production.uspGetList;  
GO  
CREATE PROCEDURE Production.uspGetList @Product varchar(40)   
    , @MaxPrice money   
    , @ComparePrice money OUTPUT  
    , @ListPrice money OUT  
AS  
    SET NOCOUNT ON;  
    SELECT p.[Name] AS Product, p.ListPrice AS 'List Price'  
    FROM Production.Product AS p  
    JOIN Production.ProductSubcategory AS s   
      ON p.ProductSubcategoryID = s.ProductSubcategoryID  
    WHERE s.[Name] LIKE @Product AND p.ListPrice < @MaxPrice;  
-- Populate the output variable @ListPprice.  
SET @ListPrice = (SELECT MAX(p.ListPrice)  
        FROM Production.Product AS p  
        JOIN  Production.ProductSubcategory AS s   
          ON p.ProductSubcategoryID = s.ProductSubcategoryID  
        WHERE s.[Name] LIKE @Product AND p.ListPrice < @MaxPrice);  
-- Populate the output variable @compareprice.  
SET @ComparePrice = @MaxPrice;  
GO