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The MySQL™ software delivers a very fast, multi-threaded, multi-user, and robust SQL (Structured Query Language) database server. MySQL Server is intended for mission-critical, heavy-load production systems as well as for embedding into mass-deployed software. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. MySQL is a trademark of Oracle Corporation and/or its affiliates, and shall not be used by Customer without Oracle's express written authorization. Other names may be trademarks of their respective owners.
The MySQL software is Dual Licensed. Users can choose to use the MySQL software as an Open Source product under the terms of the GNU General Public License (http://www.fsf.org/licenses/) or can purchase a standard commercial license from Oracle. See http://www.mysql.com/company/legal/licensing/ for more information on our licensing policies.
The following list describes some sections of particular interest in this manual:
For a discussion of MySQL Database Server capabilities, see Section 1.3.2, “The Main Features of MySQL”.
For a tutorial introduction to the MySQL Database Server, see Chapter 3, Tutorial.
For information about configuring and administering MySQL Server, see Chapter 5, MySQL Server Administration.
For information about security in MySQL, see Chapter 6, Security.
For information about setting up replication servers, see Chapter 17, Replication.
For information about MySQL Enterprise, the commercial MySQL release with advanced features and management tools, see Chapter 25, MySQL Enterprise Edition.
For answers to a number of questions that are often asked concerning the MySQL Database Server and its capabilities, see Appendix A, MySQL 5.5 Frequently Asked Questions.
For a history of new features and bug fixes, see the Release Notes.
To report problems or bugs, please use the instructions at
Section 1.7, “How to Report Bugs or Problems”. If you find a sensitive security
bug in MySQL Server, please let us know immediately by sending an
email message to
Support customers should report all problems, including security
bugs, to Oracle Support.