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SQL Tutorial

SQL HOMESQL IntroSQL SyntaxSQL SelectSQL Select DistinctSQL WhereSQL And, Or, NotSQL Order BySQL Insert IntoSQL Null ValuesSQL UpdateSQL DeleteSQL Select TopSQL Min and MaxSQL Count, Avg, SumSQL LikeSQL WildcardsSQL InSQL BetweenSQL AliasesSQL JoinsSQL Inner JoinSQL Left JoinSQL Right JoinSQL Full JoinSQL Self JoinSQL UnionSQL Group BySQL HavingSQL ExistsSQL Any, AllSQL Select IntoSQL Insert Into SelectSQL CaseSQL Null FunctionsSQL Stored ProceduresSQL CommentsSQL Operators

SQL Database

SQL Create DBSQL Drop DBSQL Backup DBSQL Create TableSQL Drop TableSQL Alter TableSQL ConstraintsSQL Not NullSQL UniqueSQL Primary KeySQL Foreign KeySQL CheckSQL DefaultSQL IndexSQL Auto IncrementSQL DatesSQL ViewsSQL InjectionSQL HostingSQL Data Types

SQL References

SQL KeywordsMySQL FunctionsSQL Server FunctionsMS Access FunctionsSQL Quick Ref

SQL Examples

SQL ExamplesSQL QuizSQL ExercisesSQL 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.

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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.

Example

SELECT * FROM Customers;
Try it Yourself »

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


SQL Exercises



SQL Examples

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

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SQL Quiz Test

Test your SQL skills at W3Schools!

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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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