SQL is a standard language for storing, manipulating and retrieving data in databases.
Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems.
Examples in Each Chapter
With our online SQL editor, you can edit the SQL statements, and click on a button to view the result.
Click on the "Try it Yourself" button to see how it works.
Learn by examples! This tutorial supplements all explanations with clarifying examples.
At W3Schools you will find a complete reference for keywords and function:
SQL Data Types
Data types and ranges for Microsoft Access, MySQL and SQL Server.