Sunday, September 25, 2011

SQL Tutorial Part1

  
                                       SQL Tutorial 

SQL is a database computer language designed for the retrieval and management of data in relational database.

SQL stands for Structured Query Language. This tutorial gives an initial push to start you with SQL.

This SQL tutorial gives unique learning on Structured Query Language and it helps to make practice on SQL commands which provides immediate results. SQL is a language of database, it includes database creation, deletion, fetching rows and modifying rows etc.

SQL is an ANSI (American National Standards Institute) standard but there are many different versions of the SQL language.

What is SQL?

SQL is structured Query Language which is a computer language for storing, manipulating and retrieving data stored in relational database.

SQL is the standard language for Relation Database System.All relational database management systems like My SQL,MS Access, Oracle, Sybase,Informix,  postgres  and  SQL Server uses SQL as standard database language.
Also they are using different dialects, Such as: 

MS SQL Server using T-SQL,
Oracle using PL/SQL
MS Access version of SQL is called JET SQL (native format )etc

Why SQL?  

Allow users to access data in relational database management systems.
Allow users to describe the data.
Allow users to define the data in database and manipulate that data.  
Allow to embed within other languages using SQL modules, libraries & pre-compilers.  
Allow users to create and drop databases and tables.
Allow users to create view, stored procedure, functions in a database.  
Allow users to set permissions on tables, procedures, and views