Sql Stored Procedure Tutorial with Examples
A stored procedure is a subroutine available to applications that access a relational database system. A stored procedure (sometimes called a proc, sproc, StoPro, StoredProc, StoreProc, sp or SP) is actually stored in the database data dictionary.
|sql stored procedure tutorial with examples|
What is SQL Stored Procedures?
A stored procedure is a group of Transact-SQL statements compiled into a single execution plan. So if you think about a query that you write over and over again, instead of having to write that query each time you would save it as a stored procedure and then just call the stored procedure to execute the SQL code that you saved as part of the stored procedure.
A stored procedure in SQL Server is similar to a procedure in other programming languages, Its a precompiled collection of Transact-SQL statements stored under a name and processed as a unit.
- It can accept input parameters and return multiple values in the form of output parameters to the calling procedure or batch.
- It can contain programming statements that perform operations in the database, including calling other procedures.
- It can return a status value to a calling procedure or batch to indicate success or faliure (and the reason for failure)
Advantages of using stored procedures
- Modular programming
- Faster Execution
- Reduction in network traffic
- Efficient reuse of code and programming abstraction
- Can be used as a security mechanism (Grant users permission to execute a stored procedure independently of underlying table permissions)
Read more about SQL Stored Procedure Best Practices
Sql Stored Procedure Example
To write a sql stored procedure use the create command:-
create procedure sp_ShowEmpDetails
select Name from Employee
Exec Stored ProcedureTo execute a sql stored procedure use the execute command:-
execute sp_ShowEmpDetails 'meerut'
Drop Stored ProcedureTo delete a sql stored procedure use the drop command:-
drop procedure sp_ShowEmpDetails;
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