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SQL Tutorial

SQL HOME SQL Intro SQL Syntax SQL Select SQL Select Distinct SQL Where SQL And, Or, Not SQL Order By SQL Insert Into SQL Null Values SQL Update SQL Delete SQL Select Top SQL Min and Max SQL Count, Avg, Sum SQL Like SQL Wildcards SQL In SQL Between SQL Aliases SQL Joins SQL Inner Join SQL Left Join SQL Right Join SQL Full Join SQL Self Join SQL Union SQL Group By SQL Having SQL Exists SQL Any, All SQL Select Into SQL Insert Into Select SQL Case SQL Null Functions SQL Stored Procedures SQL Comments

SQL Database

SQL Create DB SQL Drop DB SQL Backup DB SQL Create Table SQL Drop Table SQL Alter Table SQL Constraints SQL Not Null SQL Unique SQL Primary Key SQL Foreign Key SQL Check SQL Default SQL Index SQL Auto Increment SQL Dates SQL Views SQL Injection SQL Hosting

SQL References

SQL Keywords MySQL Functions SQL Server Functions MS Access Functions SQL Operators SQL Data Types SQL Quick Ref

SQL Test Yourself

SQL Quiz SQL Exercises SQL Certificate

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.

Example

SELECT * FROM Customers;
Try it Yourself »

Click on the "Try it Yourself" button to see how it works.

Start learning SQL now!


SQL Exercises

Test Yourself With Exercises

Exercise:

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

 * FROM Customers;

Start the Exercise



SQL Quiz Test

Test your SQL skills at W3Schools!

Start SQL Quiz!


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


SQL Exam - Get Your Diploma!

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