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SQL Functions
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SQL Group By
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SQL ucase()
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SQL round()
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SQL is a standard language for accessing and manipulating databases.

Our SQL tutorial will teach you how to use SQL to access and manipulate data in MySQL, SQL Server, MS Access, Oracle, Sybase, DB2, and other database systems.

Start learning SQL now!

SQL Demo

Learn by examples! With our editor, you can edit the SQL, and click on a button to view the result.

Try-It-Yourself!

SQL Quiz Test

Test your SQL skills at W3Schools!

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SQL Quick Reference

An SQL Quick Reference. Print it and put it in your pocket.

SQL Quick Reference

SQL Data Types

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

SQL Data Types

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