Microsoft SQL Server Stored Procedures Creating and executing a basic stored procedure
Example
Using the Authors table in the Library Database
CREATE PROCEDURE GetName
(
@input_id INT = NULL, --Input parameter, id of the person, NULL default
@name VARCHAR(128) = NULL --Input parameter, name of the person, NULL default
)
AS
BEGIN
SELECT Name + ' is from ' + Country
FROM Authors
WHERE Id = @input_id OR Name = @name
END
GO
You can execute a procedure with a few different syntaxes. First, you can use EXECUTE or EXEC
EXECUTE GetName @id = 1
EXEC Getname @name = 'Ernest Hemingway'
Additionally, you can omit the EXEC command. Also, you don't have to specify what parameter you are passing in, as you pass in all parameters.
GetName NULL, 'Ernest Hemingway'
When you want to specify the input parameters in a different order than how they are declared in the procedure you can specify the parameter name and assign values. For example
CREATE PROCEDURE dbo.sProcTemp
(
@Param1 INT,
@Param2 INT
)
AS
BEGIN
SELECT
Param1 = @Param1,
Param2 = @Param2
END
the normal order to execute this procedure is to specify the value for @Param1 first and then @Param2 second. So it will look something like this
EXEC dbo.sProcTemp @Param1 = 0,@Param2=1
But it's also possible that you can use the following
EXEC dbo.sProcTemp @Param2 = 0,@Param1=1
in this, you are specifying the value for @param2 first and @Param1 second. Which means you do not have to keep the same order as it is declared in the procedure but you can have any order as you wish. but you will need to specify to which parameter you are setting the value
Access stored procedure from any database
And also you can create a procedure with a prefix sp_ these procuedres, like all system stored procedures, can be executed without specifying the database because of the default behavior of SQL Server. When you execute a stored procedure that starts with "sp_", SQL Server looks for the procedure in the master database first. If the procedure is not found in master, it looks in the active database. If you have a stored procedure that you want to access from all your databases, create it in master and use a name that includes the "sp_" prefix.
Use Master
CREATE PROCEDURE sp_GetName
(
@input_id INT = NULL, --Input parameter, id of the person, NULL default
@name VARCHAR(128) = NULL --Input parameter, name of the person, NULL default
)
AS
BEGIN
SELECT Name + ' is from ' + Country
FROM Authors
WHERE Id = @input_id OR Name = @name
END
GO
