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, PostgreSQL, and more.
Examples in Each Chapter
With our online SQL editor, you can edit the SQL statements, and click on a button to view the result.
Example
SELECT * FROM Customers;
SQL Exercises
Many chapters in this tutorial end with an exercise where you can check your level of knowledge.
SQL Examples
Learn by examples! This tutorial supplements all explanations with clarifying examples.
See All SQL Examples
SQL Quiz Test
Test your SQL skills at W3Schools!
SQL References
At W3Schools you will find a complete reference for keywords and functions:
SQL Data Types
Data types and ranges for Microsoft Access, MySQL and SQL Server.
SQL Data Types
