SQL stand for ( Structured Query Language ) which is a computer language for storing, manipulating and retrieving data stored in relational database management system. SQL is the standard language for Relation Database System. All relational database management systems like MySQL, MS Access, Oracle and SQL Server use SQL as standard database language. SQL is used for communicate with a database according to ANSI (American National Standards Institute), it is the standard language for relational database management systems. SQL update data on a database, or retrieve data from a database. Some common relational database management systems which are used SQL queries. SQL have common commands such as Select, Insert, Update, Delete, Create, and Drop can be used in database.