What is a stored procedure? How do they work? What is the make-up of a stored procedure (things each must have to be a Stored Procedure)?
What is wrong with this stored procedure
What is wrong with this stored procedure. CREATE PROCEDURE PROC_RESULT_SET () LANGUAGE SQL RESULT SETS 1 BEGIN DECLARE MYCUR CURSOR WITH RETURN FOR SELECT USERNAME , NAME FROM SLPG.USER ORDER BY ID;
What does the new stored procedure default content mean?
When I create a new stored procedure I get an initial example of a stored procedure, what does this section mean? : CREATE PROCEDURE <Procedure_Name, sysname, ProcedureName> — Add the parameter
How to type of return value in stored procedure. And what are difference between them. Please explain me.
Determine what user called my stored procedure
I’m sure this has been asked, but search isn’t returning the answer. In a stored procedure, how do I get the value of the user/login that called the stored procedure (name?), assuming I don’t already
What factors can cause Stored Procedure Recompilation on SQL Server?
What factors should I be aware of that can cause excessive stored procedure recompilation? Examples of the code that will cause a stored procedure to recompile would be useful. The purpose would be to
What is Extended Stored Procedure in MS SQL Server
I know about Stored Procedure in MS SQL Server. But I dont have a clear idea about Extended Stored Procedure in MS SQL Server. What is it? Explain it with a simple example. Thank you.
Mysql stored procedure
What I want to do is,create a table in mysql by passing the table name as a parameter in the stored procedure.I’m using following code for stored procedure in mysql. DELIMITER // CREATE PROCEDURE crea
I write a stored procedure for most viewed photos in my procedure, this is my procedure can u check this please is ok or is there any improvement required? create procedure sp_photos_selectmostviewed
What’s wrong with this stored procedure?
getting really close to running my first stored procedure. This one compiles but when I run it with call test.fttest5(‘YEAR’); it throws an error SQL State: 22001 Vendor Code: -303 Message: [SQL0303]
I’m using If Condition Srore procedure… But .. I need if stored procedure with where in if else condition and concatenate with to and condition in Query.. Examble create procedure [dbo].[Sp_Name] @c
Generally, a stored procedure is a “SQL Function.” They have:
-- a name CREATE PROCEDURE spGetPerson -- parameters CREATE PROCEDURE spGetPerson(@PersonID int) -- a body CREATE PROCEDURE spGetPerson(@PersonID int) AS SELECT FirstName, LastName .... FROM People WHERE PersonID = @PersonID
This is a T-SQL focused example. Stored procedures can execute most SQL statements, return scalar and table-based values, and are considered to be more secure because they prevent SQL injection attacks.
Stored Procedures are a batch of SQL statements that can be executed in a couple of ways. Most major DBMs support stored procedures; however, not all do. You will need to verify with your particular DBMS help documentation for specifics. As I am most famillar with SQL Server I will use that as my samples.
To create a stored procedure the syntax is fairly simple:
CREATE PROCEDURE <owner>.<procedure name> <Param> <datatype> AS <Body>
So for example:
CREATE PROCEDURE Users_GetUserInfo @login nvarchar(30)=null AS SELECT * from [Users] WHERE ISNULL(@login,login)=login
A benefit of stored procedures is that you can centralize data access logic into a single place that is then easy for DBA’s to optimize. Stored procedures also have a security benefit in that you can grant execute rights to a stored procedure but the user will not need to have read/write permissions on the underlying tables. This is a good first step against SQL Injection.
Stored procedures do come with downsides, basically the maintaince associated with your basic CRUD operation. Let’s say for each table you have an Insert, Update, Delete and at least one select based on the Primary key, that means each table will have 4 procedures. Now take a decent size database of 400 tables, and you have 1600 procedures! And that’s assuming you don’t have duplicates which you probally will.
This is where using an ORM or some other method to auto generate your basic CRUD operations has a ton of merit.
Store Procedure use to retrieve data ,modify data,delete data in Database table. You don’t need to write whole sql command in each time you want to Insert,Update or Delete data in Sql database. All you need to do is just go to your database and create stored procedure.Now just call that Stored Procedure with giving neccesary parameters to it.I hope you can understand what I am trying to tell you.All other things like ‘How to create it?’,’How to Call it?’ you will get your answers from google easily.
Stored Procedure is a Set precompiled Sql statements that used to Perform A special Task
Example:- if I have Employee Table
Employee ID Name Age Mobile 001 Sidheswar 25 9938885469 002 Pritish 32 9178542436
First I am retrieving the Employee table
Create Procedure Employee details As Begin Select * from Employee End
For Run The Procedure in SQl Server
Execute Employee details --- (Employee details is a user defined name, give a name as you want)
Then Second I am inserting value to Employee Table
Create Procedure employee_insert (@EmployeeID int,@Name Varchar (30), @Age int, @Mobile int) As Begin Insert In to Employee Values (@EmployeeID, @Name, @Age, @Mobile ) End
For Run The Parameterized Procedure in SQl Server
Execute employee_insert 003,’xyz’,27,1234567890 --(Para meter Size must be Same with declared Column Size)
EX:[email protected] Varchar(30) In the Employee Table The Name Column s Size must be varchar(30)
Store Procedure is mainly used to perform certain task on database. for example
- Get DB result sets from some business logic on data.
- Execute multiple DB operation at single call.
- Used to migrate data from one table to another table.
- Can be called for other programming language like java.
Store Procedure use to retrieve data ,modify data,delete data in Database table. You don’t need to write whole sql command in each time you want to Insert,Update or Delete data in Sql database.
store procedure is a name collection of SQL statements and procedural logic i.e,compiled,varified and stored in the server database.A stored procedure is typically treated like other database object and controlled through server security mechanism.
A stored procedure is a group of sql statements that has been created and stored in the database. Stored procedure will accept input parameters so that a single procedure can be used over the network by several clients using different input data. Stored procedure will reduce network traffic and increase the performance. If we modify stored procedure all the clients will get the updated stored procedure
Sample of creating Stored Procedure
USE dbtest; GO CREATE PROCEDURE test_display AS SELECT FirstName, LastName FROM tb_test; GO EXEC test_display; GO DROP PROCEDURE test_display; GO
Advantages of using stored procedures
a) a) Stored procedure allows modular programming.
You can create the procedure once, store it in the database, and call it any number of times in your program.
b) b) Stored Procedure allows faster execution.
If the operation requires a large amount of SQL code is performed repetitively, stored procedures can be faster. They are parsed and optimized when they are first executed, and a compiled version of the stored procedure remains in memory cache for later use. This means the stored procedure does not need to be reparsed and reoptimized with each use resulting in much faster execution times.
c) c) Stored Procedure can reduce network traffic.
An operation requiring hundreds of lines of Transact-SQL code can be performed through a single statement that executes the code in a procedure, rather than by sending hundreds of lines of code over the network.
d) d) Stored procedures provide better security to your data
Users can be granted permission to execute a stored procedure even if they do not have permission to execute the procedure’s statements directly.
In SQL we are having different types of stored procedures are there
a) System Stored Procedures b) User Defined Stored procedures c) Extended Stored Procedures
System Stored Procedures:
System stored procedures are stored in the master database and these are starts with a sp_ prefix. These procedures can be used to perform variety of tasks to support sql server functions for external application calls in the system tables
Ex: sp_helptext [StoredProcedure_Name]
User Defined Stored Procedures:
User Defined stored procedures are usually stored in a user database and are typically designed to complete the tasks in the user database. While coding these procedures don’t use sp_ prefix because if we use the sp_ prefix first it will check master database then it comes to user defined database
Extended Stored Procedures:
Extended stored procedures are the procedures that call functions from DLL files. Now a day’s extended stored procedures are depreciated for that reason it would be better to avoid using of Extended Stored procedures.
A stored procedure is nothing but a group of SQL statements compiled into a single execution plan.
1. Create once time and call it n number of times. 2. It Reduce the network traffic.
Example: Creating a Stored Procedure
SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE PROCEDURE GetEmployee @EmployeeID int = 0 AS BEGIN SET NOCOUNT ON; SELECT FirstName, LastName, BirthDate, City, Country FROM Employees WHERE [email protected] END GO
Alter or Modify a Stored Procedure:-
SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE GetEmployee @EmployeeID int = 0 AS BEGIN SET NOCOUNT ON; SELECT FirstName, LastName, BirthDate, City, Country FROM Employees WHERE [email protected] END GO
Drop or Delete a Stored Procedure:-
DROP PROCEDURE GetEmployee
Think of a situation like this,
- You have a database with data.
- There are number of different applications need to access that central database, and in future some new applications too.
- If you are going to insert the inline database queries to access the central database, inside the each application’s code individually, then probably you have to duplicate the same query again and again inside different application’s code.
- In that kind of a situation, you can use stored procedures (SPs). With stored procedures, you are writing number of common queries (procedures) and store them with the central database.
- Now the duplication of work will never happen as before and the data access and the maintenance will be done centrally.
- In above situation, you may wonder “Why we cannot introduce a central Data-Access-Server to interact with all the applications? Yes. That will be a possible alternative. But,
- The main advantage with SPs over that approach is unlike your data-access-code with inline queries, SPs are pre-compiled statements, so they will execute faster. And communication costs (over networks) will be minimum.
- Opposite to that, SPs will add some more load to the Database-Server. If that would be a concern according to the situation, a centralized Data-Access-Server with inline queries will be a better choice.
● Stored Procedure is precompiled set of one or more SQL statements which performs some specific task.
● Store Procedure should be executed stand alone using EXEC.
● Store Procedure can return multiple parameters.
● Store Procedure can be used to implement transact
In a DBMS, a stored procedure is a set of SQL statements with an assigned name that’s stored in the database in compiled form so that it can be shared by a number of programs.
The use of stored procedure can be helpful in
(1) Providing a controlled access to data (end users can only enter or change data but can’t write procedures)
(2) Ensuring data integrity (data would be entered in consistent manner) and
(3) Improves productivity (the statements of stored procedure need to be written only once).