Question: What Is A Stored Procedure And How Is It Used?

When would you use a stored procedure?

The benefits of using stored procedures in SQL Server rather than application code stored locally on client computers include:They allow modular programming.They allow faster execution.They can reduce network traffic.They can be used as a security mechanism..

What is the advantage of using stored procedure?

To help you build powerful database applications, stored procedures provide several advantages including better performance, higher productivity, ease of use, and increased scalability.

What is difference between stored procedure and function?

The function must return a value but in Stored Procedure it is optional. Even a procedure can return zero or n values. Functions can have only input parameters for it whereas Procedures can have input or output parameters. Functions can be called from Procedure whereas Procedures cannot be called from a Function.

How are stored procedures called?

A stored procedure is a group of one or more database statements stored in the database’s data dictionary and called from either a remote program, another stored procedure, or the command line. Stored procedure are commonly called SPROCS, or SP’s.

Why stored procedure is better than query?

Code reusability and better maintainability It is easier to troubleshoot a stored procedure than inline query as we can isolate it. There is also a way to write unit test in SQL server which help to confirm the logic of stored procedure. Performance tuning is possible to do on stored procedure level.

How do you end a stored procedure?

You can use RETURN to stop execution of a stored procedure immediately. Quote taken from Books Online: Exits unconditionally from a query or procedure. RETURN is immediate and complete and can be used at any point to exit from a procedure, batch, or statement block.

What is end in SQL?

END statement is used to define a statement block. A statement block consists of a set of SQL statements that execute together. A statement block is also known as a batch. In other words, if statements are sentences, the BEGIN…

What is trigger explain?

A trigger is a block of code that is executed automatically from a database statement. Triggers is generally executed for DML statements such as INSERT, UPDATE or DELETE. It resides in a database code and is fired automatically when the database code requires to perform the INSERT ,UPDATE or DELETE statement.

Why do we need triggers?

Triggers help the database designer ensure certain actions, such as maintaining an audit file, are completed regardless of which program or user makes changes to the data. … The programs are called triggers since an event, such as adding a record to a table, fires their execution.

Is a stored procedure faster than a query?

Each and every time a query is submitted, it has to run through the procedure of finding the execulation plan. Stored procedure on the other hand should be faster because the execution plan can be created and cached the moment the procedure is added or run for the first time is the assumption.

Why you should not use stored procedures?

Stored procedures are difficult to unit test. With an ORM, you can mock your database code so as to be able to test your business logic quickly. With stored procedures, you have to rebuild an entire test database from scratch. Stored procedures offer no performance advantage whatsoever.

What is a procedure?

1a : a particular way of accomplishing something or of acting. b : a step in a procedure. 2a : a series of steps followed in a regular definite order legal procedure a surgical procedure. b : a set of instructions for a computer that has a name by which it can be called into action.

What is difference between stored procedure and trigger?

Stored procedures can be invoked explicitly by the user. … On the other hand, trigger is a stored procedure that runs automatically when various events happen (eg update, insert, delete). Triggers are more like an event handler they run at the specific event. Trigger can not take input and they can’t return values.

What are the types of triggers?

Types of TriggersData Manipulation Language (DML) Triggers. DML triggers are executed when a DML operation like INSERT, UPDATE OR DELETE is fired on a Table or View. … Data Definition Language (DDL) Triggers. … LOGON Triggers. … CLR Triggers.

What is stored procedure and why we use it?

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.

What is the use of begin and end in stored procedure?

BEGIN and END keywords are not required in Transact-SQL. BEGIN and END are used in Transact-SQL to group a set of statements into a single compound statement, so that control statements such as IF … ELSE, which affect the performance of only a single SQL statement, can affect the performance of the whole group.

What is the use of end in a procedure?

END-PROCEDURE, END-PROGRAM, END-SELECT, END‑SETUP, END-SQL, END‑WHILE, END-EXECUTE. Completes the corresponding section or paragraph. Each END-section command completes the corresponding BEGIN‑section command: BEGIN-PROCEDURE.

What are examples of triggers?

Some examples of common triggers are:the anniversary dates of losses or trauma.frightening news events.too much to do, feeling friction.the end of a relationship.spending too much time alone.being judged, criticized, teased, or put problems, getting a big bill.More items…

What are the disadvantages of stored procedures?

The main disadvantages of stored procedures are given below:Testing – Testing of a logic which is encapsulated inside a stored procedure is very difficult. … Debugging – … Versioning – … Cost – … Portability –

Why we use stored procedure instead of function?

Stored procedure allows for both table variables and temporary tables. UDF does not allow stored procedures to be called from functions while stored procedures allow calling of functions. UDF is used in join clause while stored procedures cannot be used in join clause.