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.

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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.

SQL Exercises

Test Yourself With Exercises


Insert the missing statement to get all the columns from the Customers table.

 * FROM Customers;

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SQL Examples

Learn by examples! This tutorial supplements all explanations with clarifying examples.

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SQL Quiz Test

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SQL References

At W3Schools you will find a complete reference for keywords and function:

SQL Keyword Reference

MYSQL Functions

SQLServer Functions

MS Access Functions

SQL Quick Reference

SQL Data Types

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

SQL Data Types

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