Database theory and an online tutorial interface to an Oracle database system, allowing a user to learn interactively. The site automatically checks and marks query strings, and gives instant feedback.

A shareware program that helps you learn SQL. The user writes their own statements or can take a test, and the tests take the user through various levels of difficulty.

Help the user to gain or improve skills in building query statements. A rating system is supported for SELECT exercises and certification. English and Russian versions of an SQL handbook are also available.

Application for testing and sharing SQL queries.

An online quiz to test and improve a user's database knowledge, giving a score and the correct answers on completion.

An interactive tutorial providing easy-to-understand instructions, with a live query interpreter and practice database.

A follow-up to SQLCourse, with tutorials on more advanced aspects of the language, featuring a live interpreter and database with which to test commands.

A step-by-step tutorial with live interpreters, allowing access to tables using any of Oracle, SQL Server, MySQL, Access or PostgreSQL engines.