SQL Tutorial
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.
SQL Quiz Test
Test your SQL skills at W3Schools!
SQL Quick Reference
An SQL Quick Reference. Print it and put it in your pocket.
SQL Data Types
Data types and ranges for Microsoft Access, MySQL and SQL Server.
PHP/SQL Exam - Get Your Diploma!
W3Schools' Online Certification
The perfect solution for professionals who need to balance work, family, and career building.
More than 10 000 certificates already issued!
The HTML Certificate documents your knowledge of HTML.
The CSS Certificate documents your knowledge of advanced CSS.
The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.
The jQuery Certificate documents your knowledge of jQuery.
The PHP Certificate documents your knowledge of PHP and SQL (MySQL).
The XML Certificate documents your knowledge of XML, XML DOM and XSLT.
The Bootstrap Certificate documents your knowledge of the Bootstrap framework.
