<div id="docs-body">
 <div class="chapter">
  <div class="titlepage">
   <div>
    <div>
     <h1 class="title">
      <a name="introduction">
      </a>
      Chapter 1 General Information
     </h1>
    </div>
   </div>
  </div>
  <div class="toc">
   <p>
    <b>
     Table of Contents
    </b>
   </p>
   <dl class="toc">
    <dt>
     <span class="section">
      <a href="manual-info.html">
       1.1 About This Manual
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="what-is.html">
       1.2 Overview of the MySQL Database Management System
      </a>
     </span>
    </dt>
    <dd>
     <dl>
      <dt>
       <span class="section">
        <a href="what-is-mysql.html">
         1.2.1 What is MySQL?
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="features.html">
         1.2.2 The Main Features of MySQL
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="history.html">
         1.2.3 History of MySQL
        </a>
       </span>
      </dt>
     </dl>
    </dd>
    <dt>
     <span class="section">
      <a href="mysql-releases.html">
       1.3 MySQL Releases: Innovation and LTS
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="mysql-nutshell.html">
       1.4 What Is New in MySQL 8.4 since MySQL 8.0
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="added-deprecated-removed.html">
       1.5 Server and Status Variables and Options Added, Deprecated, or Removed in
MySQL 8.4 since 8.0
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="bug-reports.html">
       1.6 How to Report Bugs or Problems
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="compatibility.html">
       1.7 MySQL Standards Compliance
      </a>
     </span>
    </dt>
    <dd>
     <dl>
      <dt>
       <span class="section">
        <a href="extensions-to-ansi.html">
         1.7.1 MySQL Extensions to Standard SQL
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="differences-from-ansi.html">
         1.7.2 MySQL Differences from Standard SQL
        </a>
       </span>
      </dt>
      <dt>
       <span class="section">
        <a href="constraints.html">
         1.7.3 How MySQL Deals with Constraints
        </a>
       </span>
      </dt>
     </dl>
    </dd>
   </dl>
  </div>
  <a class="indexterm" name="idm46045340959232">
  </a>
  <a class="indexterm" name="idm46045340958160">
  </a>
  <p>
   The MySQL software delivers a very fast, multithreaded, 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.
  </p>
  <p>
   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 (
   <a class="ulink" href="http://www.fsf.org/licenses/" target="_blank">
    http://www.fsf.org/licenses/
   </a>
   )
    or can purchase a standard commercial license from Oracle. See
   <a class="ulink" href="http://www.mysql.com/company/legal/licensing/" target="_blank">
    http://www.mysql.com/company/legal/licensing/
   </a>
   for
    more information on our licensing policies.
  </p>
  <p>
   The following list describes some sections of particular interest in
    this manual:
  </p>
  <div class="itemizedlist">
   <ul class="itemizedlist" style="list-style-type: disc; ">
    <li class="listitem">
     <p>
      For a discussion of MySQL Database Server capabilities, see
      <a class="xref" href="features.html" title="1.2.2 The Main Features of MySQL">
       Section 1.2.2, “The Main Features of MySQL”
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For an overview of new MySQL features, see
      <a class="xref" href="mysql-nutshell.html" title="1.4 What Is New in MySQL 8.4 since MySQL 8.0">
       Section 1.4, “What Is New in MySQL 8.4 since MySQL 8.0”
      </a>
      . For information about the
        changes in each version, see the
      <a class="ulink" href="/doc/relnotes/mysql/8.4/en/" target="_top">
       Release
        Notes
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For installation instructions, see
      <a class="xref" href="installing.html" title="Chapter 2 Installing MySQL">
       Chapter 2,
       <i>
        Installing MySQL
       </i>
      </a>
      .
        For information about upgrading MySQL, see
      <a class="xref" href="upgrading.html" title="Chapter 3 Upgrading MySQL">
       Chapter 3,
       <i>
        Upgrading MySQL
       </i>
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For a tutorial introduction to the MySQL Database Server, see
      <a class="xref" href="tutorial.html" title="Chapter 5 Tutorial">
       Chapter 5,
       <i>
        Tutorial
       </i>
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For information about configuring and administering MySQL
        Server, see
      <a class="xref" href="server-administration.html" title="Chapter 7 MySQL Server Administration">
       Chapter 7,
       <i>
        MySQL Server Administration
       </i>
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For information about security in MySQL, see
      <a class="xref" href="security.html" title="Chapter 8 Security">
       Chapter 8,
       <i>
        Security
       </i>
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For information about setting up replication servers, see
      <a class="xref" href="replication.html" title="Chapter 19 Replication">
       Chapter 19,
       <i>
        Replication
       </i>
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For information about MySQL Enterprise, the commercial MySQL
        release with advanced features and management tools, see
      <a class="xref" href="mysql-enterprise.html" title="Chapter 32 MySQL Enterprise Edition">
       Chapter 32,
       <i>
        MySQL Enterprise Edition
       </i>
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For answers to a number of questions that are often asked
        concerning the MySQL Database Server and its capabilities, see
      <a class="xref" href="faqs.html" title="Appendix A MySQL 8.4 Frequently Asked Questions">
       Appendix A,
       <i>
        MySQL 8.4 Frequently Asked Questions
       </i>
      </a>
      .
     </p>
    </li>
    <li class="listitem">
     <p>
      For a history of new features and bug fixes, see the
      <a class="ulink" href="/doc/relnotes/mysql/8.4/en/" target="_top">
       Release
        Notes
      </a>
      .
     </p>
    </li>
   </ul>
  </div>
  <a class="indexterm" name="idm46045335350160">
  </a>
  <a class="indexterm" name="idm46045335348768">
  </a>
  <a class="indexterm" name="idm46045335347376">
  </a>
  <a class="indexterm" name="idm46045335345984">
  </a>
  <div class="important" style="margin-left: 0.5in; margin-right: 0.5in;">
   <div class="admon-title">
    Important
   </div>
   <p>
    To report problems or bugs, please use the instructions at
    <a class="xref" href="bug-reports.html" title="1.6 How to Report Bugs or Problems">
     Section 1.6, “How to Report Bugs or Problems”
    </a>
    . If you find a security bug in MySQL
      Server, please let us know immediately by sending an email message
      to
    <code class="email">
     &lt;
     <a class="email" href="mailto:secalert_us@oracle.com">
      secalert_us@oracle.com
     </a>
     &gt;
    </code>
    .
    <span class="emphasis">
     <em>
      Exception
     </em>
    </span>
    : Support customers should report
      all problems, including security bugs, to Oracle Support.
   </p>
  </div>
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