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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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<title>Reference — MongoDB Manual</title>
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<div class="section" id="reference">
<h1>Reference<a class="headerlink" href="#reference" title="Permalink to this headline">¶</a></h1>
<div class="section" id="mongodb-interface">
<h2>MongoDB Interface<a class="headerlink" href="#mongodb-interface" title="Permalink to this headline">¶</a></h2>
<div class="section" id="id1">
<h3>Reference<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h3>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="reference/operator.html">Query, Update, Projection, and Aggregation Operators</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/command.html">Database Commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/method.html">JavaScript Methods</a></li>
</ul>
</div>
</div>
<div class="section" id="mongodb-and-sql-interface-comparisons">
<h3>MongoDB and SQL Interface Comparisons<a class="headerlink" href="#mongodb-and-sql-interface-comparisons" title="Permalink to this headline">¶</a></h3>
<p>The following documents provide mappings between MongoDB
concepts and statements and SQL concepts and statements.</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="reference/sql-comparison.html">SQL to MongoDB Mapping Chart</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/sql-aggregation-comparison.html">SQL to Aggregation Framework Mapping Chart</a></li>
</ul>
</div>
</div>
<div class="section" id="overviews">
<h3>Overviews<a class="headerlink" href="#overviews" title="Permalink to this headline">¶</a></h3>
<p>For this reference material in another form, consider the following
interface overview pages:</p>
<ul class="simple">
<li><a class="reference internal" href="reference/operators.html"><em>Operator Reference</em></a> for an overview of all query, update, and projection operators;</li>
<li><a class="reference internal" href="reference/meta-query-operators.html"><em>Meta Query Operators</em></a> for all special “meta” query operators;</li>
<li><a class="reference internal" href="reference/aggregation.html"><em>Aggregation Framework Reference</em></a> for all <a class="reference internal" href="aggregation.html"><em>aggregation</em></a> operators;</li>
<li><a class="reference internal" href="reference/commands.html"><em>Command Reference</em></a> for an overview of all <a class="reference internal" href="reference/glossary.html#term-database-command"><em class="xref std std-term">database commands</em></a>; and</li>
<li><a class="reference internal" href="reference/javascript.html"><em>JavaScript Interface</em></a> for all <tt class="xref mongodb mongodb-program docutils literal"><span class="pre">mongo</span></tt> shell methods and helpers.</li>
<li><a class="reference internal" href="reference/mongo-shell-reference.html"><em>mongo Shell Quick Reference</em></a> for a <tt class="xref mongodb mongodb-program docutils literal"><span class="pre">mongo</span></tt> shell quick reference.</li>
</ul>
</div>
</div>
<div class="section" id="architecture-and-components">
<span id="man-pages"></span><h2>Architecture and Components<a class="headerlink" href="#architecture-and-components" title="Permalink to this headline">¶</a></h2>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="reference/components.html">MongoDB Package Components</a><ul>
<li class="toctree-l2"><a class="reference internal" href="reference/components.html#core-processes">Core Processes</a><ul>
<li class="toctree-l3"><a class="reference internal" href="reference/mongod.html"><tt class="docutils literal"><span class="pre">mongod</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongos.html"><tt class="docutils literal"><span class="pre">mongos</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongo.html"><tt class="docutils literal"><span class="pre">mongo</span></tt></a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="reference/components.html#windows-services">Windows Services</a><ul>
<li class="toctree-l3"><a class="reference internal" href="reference/mongod.exe.html"><tt class="docutils literal"><span class="pre">mongod.exe</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongos.exe.html"><tt class="docutils literal"><span class="pre">mongos.exe</span></tt></a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="reference/components.html#binary-import-and-export-tools">Binary Import and Export Tools</a><ul>
<li class="toctree-l3"><a class="reference internal" href="reference/mongodump.html"><tt class="docutils literal"><span class="pre">mongodump</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongorestore.html"><tt class="docutils literal"><span class="pre">mongorestore</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/bsondump.html"><tt class="docutils literal"><span class="pre">bsondump</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongooplog.html"><tt class="docutils literal"><span class="pre">mongooplog</span></tt></a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="reference/components.html#data-import-and-export-tools">Data Import and Export Tools</a><ul>
<li class="toctree-l3"><a class="reference internal" href="reference/mongoimport.html"><tt class="docutils literal"><span class="pre">mongoimport</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongoexport.html"><tt class="docutils literal"><span class="pre">mongoexport</span></tt></a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="reference/components.html#diagnostic-tools">Diagnostic Tools</a><ul>
<li class="toctree-l3"><a class="reference internal" href="reference/mongostat.html"><tt class="docutils literal"><span class="pre">mongostat</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongotop.html"><tt class="docutils literal"><span class="pre">mongotop</span></tt></a></li>
<li class="toctree-l3"><a class="reference internal" href="reference/mongosniff.html"><tt class="docutils literal"><span class="pre">mongosniff</span></tt></a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="reference/components.html#gridfs">GridFS</a><ul>
<li class="toctree-l3"><a class="reference internal" href="reference/mongofiles.html"><tt class="docutils literal"><span class="pre">mongofiles</span></tt></a></li>
</ul>
</li>
</ul>
</li>
</ul>
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<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="reference/configuration-options.html">Configuration File Options</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/connection-string.html">Connection String URI Format</a></li>
</ul>
</div>
</div>
<div class="section" id="status-and-reporting">
<h2>Status and Reporting<a class="headerlink" href="#status-and-reporting" title="Permalink to this headline">¶</a></h2>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="reference/server-status-index.html">Server Status Output Index</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/server-status.html">Server Status Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/database-statistics.html">Database Statistics Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/collection-statistics.html">Collection Statistics Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/collection-validation.html">Collection Validation Data</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/connection-pool-stats.html">Connection Pool Statistics Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/replica-status.html">Replica Set Status Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/replica-configuration.html">Replica Set Configuration</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/replication-info.html">Replication Info Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/current-op.html">Current Operation Reporting</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/database-profiler.html">Database Profiler Output</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/explain.html">Explain Output</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/exit-codes.html">Exit Codes and Statuses</a></li>
</ul>
</div>
</div>
<div class="section" id="internal-metadata">
<h2>Internal Metadata<a class="headerlink" href="#internal-metadata" title="Permalink to this headline">¶</a></h2>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="reference/config-database.html">Config Database Contents</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/local-database.html">The <tt class="docutils literal"><span class="pre">local</span></tt> Database</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/system-collections.html">System Collections</a></li>
</ul>
</div>
</div>
<div class="section" id="general-reference">
<h2>General Reference<a class="headerlink" href="#general-reference" title="Permalink to this headline">¶</a></h2>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="reference/limits.html">MongoDB Limits and Thresholds</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/mongodb-extended-json.html">MongoDB Extended JSON</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference/glossary.html">Glossary</a></li>
</ul>
</div>
<div class="admonition-see-also admonition seealso">
<p class="first admonition-title">See also</p>
<p class="last">The <a class="reference internal" href="genindex.html"><em>Index</em></a> may provide useful insight into the
reference material in this manual.</p>
</div>
</div>
<div class="section" id="release-notes">
<h2>Release Notes<a class="headerlink" href="#release-notes" title="Permalink to this headline">¶</a></h2>
<p>Always install the latest, stable version of MongoDB. See the
following release notes for an account of the changes in major
versions. Release notes also include instructions for upgrade.</p>
<p>Current stable release (v2.2-series):</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="release-notes/2.2.html">Release Notes for MongoDB 2.2</a></li>
</ul>
</div>
<p>See <a class="reference internal" href="release-notes/2.2-changes.html"><em>Changes in MongoDB 2.2</em></a> for an overview of all changes
in 2.2.</p>
<p>Previous stable releases:</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="release-notes/2.0.html">Release Notes for MongoDB 2.0</a></li>
<li class="toctree-l1"><a class="reference internal" href="release-notes/1.8.html">Release Notes for MongoDB 1.8</a></li>
</ul>
</div>
<p>Current Development series:</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="release-notes/2.4.html">Release Notes for MongoDB 2.4 (2.3 Development Series)</a></li>
</ul>
</div>
<p>Other MongoDB release notes:</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="release-notes/drivers-write-concern.html">Default Write Concern Change</a><ul>
<li class="toctree-l2"><a class="reference internal" href="release-notes/drivers-write-concern.html#changes">Changes</a></li>
<li class="toctree-l2"><a class="reference internal" href="release-notes/drivers-write-concern.html#releases">Releases</a></li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<div id="btnv">
<ul id="btnvl">
<li id="btnvpr"><a href="faq/indexes.html" title="Previous Section: FAQ: Indexes">< FAQ: Indexes</a></li>
<li id="btnvnx"><a href="reference/operator.html" title="Next Section: Query, Update, Projection, and Aggregation Operators">Query, Update, Projection, and Aggregation Operators ></a></li>
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© Copyright 2011-2012, 10gen, Inc. Licensed under <a href="http://creativecommons.org/licenses/by-nc-sa/3.0/">Creative Commons</a>.
<p>MongoDB®, Mongo®, and the leaf logo are registered trademarks of 10gen, Inc.</p>
<p>The MongoDB Documentation Project uses <a href="https://github.com/mongodb/docs">GitHub</a>. Fork the repository and submit pull requests to contribute.</p>
<p>If you find any issues with the documentation feel free to open a <a href="http://jira.mongodb.org/browse/DOCS">Jira Case</a> and we'll work to resolve it promptly.</p>
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