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Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0, Version 1.0,
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and under the Eclipse Public License, Version 1.0
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<title>
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H2 Database Engine
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<div style="width:780px; margin:0 auto;">
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<h1>H2 Database Engine Cheat Sheet</h1>
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<h2>Using H2</h2>
<ul><li><a href="http://h2database.com">H2</a> is
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    <a href="https://github.com/h2database/h2database">open source</a>,
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    <a href="license.html">free to use and distribute</a>.
</li><li><a href="http://h2database.com/html/download.html">Download</a>:
    <a href="http://repo1.maven.org/maven2/com/h2database/h2/${version}/h2-${version}.jar" class="link">jar</a>,
    <a href="http://www.h2database.com/h2-setup-${versionDate}.exe" class="link">installer (Windows)</a>,
    <a href="http://www.h2database.com/h2-${versionDate}.zip" class="link">zip</a>.
</li><li>To start the
    <a href="quickstart.html#h2_console">H2 Console tool</a>, double click the jar file, or
    run <code>java -jar h2*.jar</code>, <code>h2.bat</code>, or <code>h2.sh</code>.
</li><li><a href="tutorial.html#creating_new_databases">A new database is automatically created</a>
    <a href="features.html#database_only_if_exists">by default</a>.
</li><li><a href="features.html#closing_a_database">Closing the last connection closes the database</a>.
</li></ul>

<h2>Documentation</h2>
<p>
Reference:
<a href="grammar.html" class="link">SQL grammar</a>,
<a href="functions.html" class="link">functions</a>,
<a href="datatypes.html" class="link">data types</a>,
<a href="tutorial.html#command_line_tools" class="link">tools</a>,
<a href="../javadoc/index.html" class="link">API</a>
<br />
<a href="features.html">Features</a>:
<a href="tutorial.html#fulltext" class="link">fulltext search</a>,
<a href="features.html#file_encryption" class="link">encryption</a>,
<a href="features.html#read_only" class="link">read-only</a>
<a href="features.html#database_in_zip" class="link">(zip/jar)</a>,
<a href="tutorial.html#csv" class="link">CSV</a>,
<a href="features.html#auto_reconnect" class="link">auto-reconnect</a>,
<a href="features.html#triggers" class="link">triggers</a>,
<a href="features.html#user_defined_functions" class="link">user functions</a>
</p>

<h2><a href="features.html#database_url">Database URLs</a></h2>
<p>
<b><a href="features.html#connection_modes">Embedded</a></b><br />
<code>jdbc:h2:~/test</code> 'test' in the user home directory<br />
<code>jdbc:h2:/data/test</code> 'test' in the directory /data<br />
<code>jdbc:h2:test</code> in the current(!) working directory<br />
</p><p>
<b><a href="features.html#in_memory_databases">In-Memory</a></b><br />
<code>jdbc:h2:mem:test</code> multiple connections in one process<br />
<code>jdbc:h2:mem:</code> unnamed private; one connection<br />
</p><p>
<b><a href="tutorial.html#using_server">Server Mode</a></b><br />
<code>jdbc:h2:tcp://localhost/~/test</code> user home dir<br />
<code>jdbc:h2:tcp://localhost//data/test</code> absolute dir<br />
<a href="tutorial.html#using_server">Server start</a>:<code>java -cp *.jar org.h2.tools.Server</code>
</p><p>
<b><a href="features.html#database_url">Settings</a></b><br />
<code>jdbc:h2:..;MODE=MySQL</code> <a href="features.html#compatibility" >compatibility (or HSQLDB,...)</a><br />
<code>jdbc:h2:..;TRACE_LEVEL_FILE=3</code> <a href="features.html#trace_options">log to *.trace.db</a><br />
</p>

</div>
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<h2><a href="tutorial.html#connecting_using_jdbc">Using the JDBC API</a></h2>
<pre>
Connection conn = DriverManager.
    getConnection("jdbc:h2:~/test");
conn.close();
</pre>

<h2><a href="tutorial.html#connection_pool">Connection Pool</a></h2>
<pre>
import org.h2.jdbcx.JdbcConnectionPool;
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JdbcConnectionPool cp = JdbcConnectionPool.
    create("jdbc:h2:~/test", "sa", "sa");
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Connection conn = cp.getConnection();
conn.close(); cp.dispose();
</pre>

<h2><a href="build.html#maven2">Maven 2</a></h2>
<pre>
&lt;dependency&gt;
    &lt;groupId&gt;com.h2database&lt;/groupId&gt;
    &lt;artifactId&gt;h2&lt;/artifactId&gt;
    &lt;version&gt;${version}&lt;/version&gt;
&lt;/dependency&gt;
</pre>

<h2><a href="tutorial.html#using_hibernate">Hibernate</a></h2>
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<p>
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hibernate.cfg.xml (or use the HSQLDialect):
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</p>
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<pre>
&lt;property name="dialect"&gt;
    org.hibernate.dialect.H2Dialect
&lt;/property&gt;
</pre>

<h2><a href="tutorial.html#using_toplink">TopLink and Glassfish</a></h2>
<p>
Datasource class: <code>org.h2.jdbcx.JdbcDataSource</code><br />
<code>oracle.toplink.essentials.platform.</code><br />
<code>database.H2Platform</code>
</p>

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