Frequent question: What is stored procedure in SQL Server and why we use it?

Why would you use a stored procedure?

A stored procedure allows for faster execution if the same queries are performed repetitively. The queries are parsed and optimized when first executed and a compiled version of the stored procedure remains in-memory cache for later use.

What is a stored procedure and why is it particularly useful?

By grouping SQL statements, a stored procedure allows them to be executed with a single call. This minimizes the use of slow networks, reduces network traffic, and improves round-trip response time. OLTP applications, in particular, benefit because result set processing eliminates network bottlenecks.

What is stored procedure in Microsoft SQL Server?

SQL Server stored procedure is a batch of statements grouped as a logical unit and stored in the database. The stored procedure accepts the parameters and executes the T-SQL statements in the procedure, returns the result set if any.

Why you should not use stored procedures?

Stored procedures are inflexible. … 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.

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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.

What is trigger and its advantages?

Advantages of Triggers

Enforces referential integrity. Event logging and storing information on table access. Auditing. Synchronous replication of tables. Imposing security authorizations.

Why stored procedure is better than query?

every query is submited it will be compiled & then executed. where as stored procedure is compiled when it is submitted for the first time & this compiled content is stored in something called procedure cache,for subsequent calls no compilation,just execution & hence better performance than query.

How does stored procedure work?

Stored procedures differ from ordinary SQL statements and from batches of SQL statements in that they are precompiled. … Subsequently, the procedure is executed according to the stored plan. Since most of the query processing work has already been performed, stored procedures execute almost instantly.

What are the two types of Stored Procedures?

Different Types of stored procedure sql Server

  • System Defined Stored Procedure. These stored procedures are already defined in SQL Server. …
  • Extended Procedure. Extended procedures provide an interface to external programs for various maintenance activities. …
  • User-Defined Stored Procedure. …
  • CLR Stored Procedure.

How many types of stored procedure are there?

The Stored Procedures stage supports three types of procedures: Transform procedures. Source procedures. Target procedures.

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What are disadvantages of stored procedures?

Drawbacks of Stored Procedures

  • Testability. First and foremost business logic which is encapsulated in stored procedures becomes very difficult to test (if tested at all). …
  • Debugging. …
  • Versioning. …
  • History. …
  • Branching. …
  • Runtime Validation. …
  • Maintainability. …
  • Fear of change.

What is the drawback of stored procedure?

Testing of a logic which is encapsulated inside a stored procedure is very difficult. Any data errors in handling stored procedures are not generated until runtime.

Portability –

Advantages Disadvantages
It is faster. It is difficult to debug.
It is pre-compiled. Need expert developer, since difficult to write code.

What are the disadvantages of using stored procedure?

Drawbacks to Using Stored Procedures

Complex Stored Procedures that utilize complex, core functionality of the RDBMS used for their creation will not always port to upgraded versions of the same database. This is especially true if moving from one database type (Oracle) to another (MS SQL Server).

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