Quick Answer: Why Do We Need Stored Procedure?

What is difference between stored proc and query?

What is the difference between a query and stored procedure.

query and stored procedure do the same thing but the difference is that a query should be compiled everytime the query is executed,while the stored procedure is in compiled form when executed first time..

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. … END statement allows you to define paragraphs.

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.

Why we use stored procedure instead of query?

A stored procedure is invoked as a function call instead of a SQL query. Stored procedures can have parameters for both passing values into the procedure and returning values from the call. Results can be returned as a result set, or as an OUT parameter cursor.

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 do you run a trigger?

Running a TriggerIn the Databases folder in Enterprise Explorer, under the database connection profile, expand the navigation tree for the appropriate database and schema owner. … Expand the Tables folder, the table where the trigger is located, and then the Triggers folder.Right-click the trigger and select Run.More items…

What are the after triggers?

After Trigger in SQL Server These kinds of triggers fire after the execution of an action query that can be either DDL statements like Create, Alter and Drop or DML statements like Insert, Update and Delete.

Can we create stored procedure without begin and end?

It is my preferred way even though stored procedures can be written without “Begin End”. … In SQL server, whenever a transaction is started, the global variable @@TRANCOUNT is increased by 1 so l relied on this metadata to show that “Begin End” in a stored procedure does not automatically start a transaction.

Why we should not use triggers?

Triggers can cause performance issues if not written carefully and not enough developers are knowledgeable enough to write them well. … Triggers are often slower than other means of maintaining data integrity, so if you can use a check constraint, use that instead of a trigger.

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.

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.

Why stored procedure is faster than query?

Stored procedures are precompiled and optimised, which means that the query engine can execute them more rapidly. By contrast, queries in code must be parsed, compiled, and optimised at runtime. This all costs time.

What are three advantages to using SQL?

Some advantages of SQL are as follows:Faster Query Processing – Large amount of data is retrieved quickly and efficiently. … No Coding Skills – For data retrieval, large number of lines of code is not required. … Standardised Language – … Portable – … Interactive Language – … Multiple data views –

What is the purpose of stored procedure?

What is a 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.

Should I use stored procedures or not?

Stored Procedures are really good for queries that are very common, that will not change frequently. … Also, if you have a very complex query that could take a lot of horsepower on the client end, a stored procedure would help. Any query that could be dynamic should not be a SP.