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<li class="toctree-l2"><a class="reference internal" href="../incoming/routing.html">URI Routing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../incoming/auto_routing_improved.html">Auto Routing (Improved)</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../incoming/message.html">HTTP Messages</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../incoming/request.html">Request Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../incoming/methodspoofing.html">HTTP Method Spoofing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../outgoing/api_responses.html">API Response Trait</a></li>
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<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
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<li class="toctree-l2 current"><a class="current reference internal" href="#">Query Helper Methods</a></li>
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<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting Metadata</a></li>
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<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../models/index.html">Modeling Data</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../models/model.html">Using CodeIgniter's Model</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../models/entities.html">Using Entity Classes</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../dbmgmt/index.html">Managing Databases</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/curlrequest.html">CURLRequest Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Service</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/honeypot.html">Honeypot Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/time.html">Times and Dates</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/uploaded_files.html">Working with Uploaded Files</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">Working with URIs</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/validation.html">Validation</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/filesystem_helper.html">Filesystem Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/test_helper.html">Test Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="../testing/index.html">Testing</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../testing/overview.html">Getting Started</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/database.html">Database</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/fabricator.html">Generating Data</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/controllers.html">Controller Testing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/feature.html">HTTP Testing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/response.html">Testing Responses</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/cli.html">Testing CLI Commands</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/mocking.html">Mocking</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/benchmark.html">Benchmarking</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/debugging.html">Debugging Your Application</a></li>
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</li>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../cli/index.html">Command Line Usage</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_overview.html">CLI Overview</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_controllers.html">Running Controllers via CLI</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/spark_commands.html">Spark Commands</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_commands.html">Creating Spark Commands</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_generators.html">CLI Generators</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_library.html">CLI Library</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_request.html">CLIRequest Class</a></li>
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</ul>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../extending/index.html">Extending CodeIgniter</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../extending/core_classes.html">Creating Core System Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/common.html">Replacing Common Functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/events.html">Events</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/basecontroller.html">Extending the Controller</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/authentication.html">Authentication</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/composer_packages.html">Creating Composer Packages</a></li>
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<a class="btn btn-neutral float-right" href="https://github.com/codeigniter4/CodeIgniter4/edit/develop/user_guide_src/source/database/helpers.rst">Edit this page</a>
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<li class="breadcrumb-item"><a href="index.html">Working with Databases</a></li>
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<li class="breadcrumb-item active">Query Helper Methods</li>
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<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
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<div itemprop="articleBody">
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<section id="query-helper-methods">
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<h1>Query Helper Methods<a class="headerlink" href="#query-helper-methods" title="Permalink to this heading"></a></h1>
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<nav class="contents local" id="contents">
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<ul class="simple">
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<li><p><a class="reference internal" href="#information-from-executing-a-query" id="id1">Information From Executing a Query</a></p>
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<ul>
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<li><p><a class="reference internal" href="#db-insertid" id="id2">$db->insertID()</a></p></li>
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<li><p><a class="reference internal" href="#db-affectedrows" id="id3">$db->affectedRows()</a></p></li>
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<li><p><a class="reference internal" href="#db-getlastquery" id="id4">$db->getLastQuery()</a></p></li>
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</ul>
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</li>
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<li><p><a class="reference internal" href="#information-about-your-database" id="id5">Information About Your Database</a></p>
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<ul>
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<li><p><a class="reference internal" href="#db-countall" id="id6">$db->countAll()</a></p></li>
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<li><p><a class="reference internal" href="#db-countallresults" id="id7">$db->countAllResults()</a></p></li>
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<li><p><a class="reference internal" href="#db-getplatform" id="id8">$db->getPlatform()</a></p></li>
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<li><p><a class="reference internal" href="#db-getversion" id="id9">$db->getVersion()</a></p></li>
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</ul>
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</li>
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</ul>
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</nav>
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<section id="information-from-executing-a-query">
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<h2><a class="toc-backref" href="#id1" role="doc-backlink">Information From Executing a Query</a><a class="headerlink" href="#information-from-executing-a-query" title="Permalink to this heading"></a></h2>
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<section id="db-insertid">
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<h3><a class="toc-backref" href="#id2" role="doc-backlink">$db->insertID()</a><a class="headerlink" href="#db-insertid" title="Permalink to this heading"></a></h3>
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<p>The insert ID number when performing database inserts.</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>If using the PDO driver with PostgreSQL, or using the Interbase
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driver, this function requires a $name parameter, which specifies the
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appropriate sequence to check for the insert id.</p>
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</div>
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</section>
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<section id="db-affectedrows">
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<h3><a class="toc-backref" href="#id3" role="doc-backlink">$db->affectedRows()</a><a class="headerlink" href="#db-affectedrows" title="Permalink to this heading"></a></h3>
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<p>Displays the number of affected rows, when doing “write” type queries
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(insert, update, etc.).</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>In MySQL “DELETE FROM TABLE” returns 0 affected rows. The database
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class has a small hack that allows it to return the correct number of
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affected rows. By default this hack is enabled but it can be turned off
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in the database driver file.</p>
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</div>
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</section>
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<section id="db-getlastquery">
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<h3><a class="toc-backref" href="#id4" role="doc-backlink">$db->getLastQuery()</a><a class="headerlink" href="#db-getlastquery" title="Permalink to this heading"></a></h3>
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<p>Returns a Query object that represents the last query that was run (the query string, not the result).</p>
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</section>
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</section>
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<section id="information-about-your-database">
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<h2><a class="toc-backref" href="#id5" role="doc-backlink">Information About Your Database</a><a class="headerlink" href="#information-about-your-database" title="Permalink to this heading"></a></h2>
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<section id="db-countall">
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<h3><a class="toc-backref" href="#id6" role="doc-backlink">$db->countAll()</a><a class="headerlink" href="#db-countall" title="Permalink to this heading"></a></h3>
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<p>Permits you to determine the number of rows in a particular table.
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Submit the table name in the first parameter. This is part of Query Builder.</p>
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<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
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<span class="k">echo</span> <span class="nv">$db</span><span class="o">-></span><span class="na">table</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">)</span><span class="o">-></span><span class="na">countAll</span><span class="p">();</span>
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<span class="c1">// Produces an integer, like 25</span>
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</pre></div>
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</div>
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</section>
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<section id="db-countallresults">
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<h3><a class="toc-backref" href="#id7" role="doc-backlink">$db->countAllResults()</a><a class="headerlink" href="#db-countallresults" title="Permalink to this heading"></a></h3>
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<p>Permits you to determine the number of rows in a particular result set.
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Submit the table name in the first parameter. This is part of Query Builder.</p>
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<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
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<span class="k">echo</span> <span class="nv">$db</span><span class="o">-></span><span class="na">table</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">)</span><span class="o">-></span><span class="na">like</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'match'</span><span class="p">)</span><span class="o">-></span><span class="na">countAllResults</span><span class="p">();</span>
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<span class="c1">// Produces an integer, like 5</span>
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</pre></div>
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</div>
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</section>
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<section id="db-getplatform">
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<h3><a class="toc-backref" href="#id8" role="doc-backlink">$db->getPlatform()</a><a class="headerlink" href="#db-getplatform" title="Permalink to this heading"></a></h3>
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<p>Outputs the database platform (DBDriver) you are running (MySQLi, SQLSRV, Postgre,
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etc…):</p>
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<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
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<span class="k">echo</span> <span class="nv">$db</span><span class="o">-></span><span class="na">getPlatform</span><span class="p">();</span>
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</pre></div>
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</div>
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</section>
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<section id="db-getversion">
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<h3><a class="toc-backref" href="#id9" role="doc-backlink">$db->getVersion()</a><a class="headerlink" href="#db-getversion" title="Permalink to this heading"></a></h3>
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<p>Outputs the database version you are running:</p>
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<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
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<span class="k">echo</span> <span class="nv">$db</span><span class="o">-></span><span class="na">getVersion</span><span class="p">();</span>
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</pre></div>
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</div>
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</section>
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