What is SQL


SQL is a database query language, which allows you to communicate with Relational Database Management Systems and manipulate their data. SQL is short for Structured Query Language and is pronounced as SQL. SQL was developed by IBM in 1974/1975 for their mainframe systems.

This free SQL training guide will teach you how to select data from a database tables, how to insert data, how to delete data and how to update existing database records.

SQL is both ISO and ANSI standard for accessing data in RDBMS and is used by the most popular RDBMS like MS SQL Server, Oracle, DB2 and Microsoft Access.