History and overview of the language.

A nicely structured manuscript on SQL by Philip Greenspun, based on the Oracle database. Queries, transactions, triggers, and RDBMS concepts are covered.

An interactive tutorial. Allows access to tables using any of Oracle, SQL Server, MySQL, Access or PostgreSQL engines.

This site aims to teach beginners the building blocks of SQL.

SQL tutorial featuring a guide to SQL language concepts and SQL commands.

Full set of SQL language tutorials featuring in depth coverage on each SQL command.

Article by Mike Hillyer. Normalizing data is the most effective way to decrease storage requirements and increase data integrity. In this tutorial we cover the basics of data normalization.

By Pan Pantziarka. From creating a simple database to select queries, joins, updates, inserts.

Complete SQL Tutorial using SQL92.

A good introduction to SQL selects, joins and grouping.