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.


SELECT * FROM Customers;
Try it Yourself »
Click on the "Try it Yourself" button to see how it works. Start learning SQL now!

SQL Quiz Test

Test your SQL skills at W3Schools! Start SQL Quiz!

SQL Quick Reference

An SQL Quick Reference. Print it and put it in your pocket. SQL Quick Reference

SQL Data Types

Data types and ranges for Microsoft Access, MySQL and SQL Server. SQL Data Types