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Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now » Examples in Each Chapter
W3Schools has created an SQL database in your browser. The menu to the right displays the database, and will reflect any changes. Feel free to experiment with any SQL statement.
The SQL cheat sheet provides you with the most commonly used SQL statements for your reference. You can download the SQL cheat sheet as follows: Download 3-page SQL cheat sheet in PDF format. Querying data from a table. Query data in columns c1, c2 from a table. SELECT c1, c2 FROM t; Code language:SQL (Structured Query Language)(sql)
19 Tutorials. SQL (Structured Query Language) is a standard database programming language used for accessing and manipulating data in a database. This SQL tutorial series will help you learn SQL from the basics.
Create a table with a Primary Key. To create a table with a primary key, we can write the following command. In MySQL. CREATE TABLE Companies ( id int, name varchar (50), address text, email varchar (50), phone varchar (10), PRIMARY KEY (id) ); In Oracle and SQL Server.
SQL Editor. With our online SQL editor, you can edit SQL statements, and view the result in your browser.
Example Get your own SQL Server. SELECT * FROM Customers; Try it Yourself » Click on the "Try it Yourself" button to see how it works. MySQL Exercises. Test Yourself With Exercises. Exercise: Insert the missing statement to get all the columns from the Customers table. * FROM Customers; Submit Answer » Start the Exercise. MySQL Examples.
