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.Start learning SQL now »
Examples in Each Chapter
With our online SQL editor, you can edit the SQL statements, and click on a button to view the result.
SELECT * FROM Customers;
Try it Yourself »
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.