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diff --git a/user_guide/database/helpers.html b/user_guide/database/helpers.html deleted file mode 100644 index d81eb8271..000000000 --- a/user_guide/database/helpers.html +++ /dev/null @@ -1,592 +0,0 @@ - - -<!DOCTYPE html> -<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> -<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> -<head> - <meta charset="utf-8"> - <meta name="viewport" content="width=device-width, initial-scale=1.0"> - - <title>Query Helper Methods — CodeIgniter 3.1.9 documentation</title> - - - - - <link rel="shortcut icon" href="../_static/ci-icon.ico"/> - - - - <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'> - - - - - - - - - - <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> - - - - <link rel="index" title="Index" - href="../genindex.html"/> - <link rel="search" 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style="float:right;margin-left:5px;" id="closeMe"> - <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> - </div> - </ul> - <hr/> -</div> - <div role="main" class="document"> - - <div class="section" id="query-helper-methods"> -<h1>Query Helper Methods<a class="headerlink" href="#query-helper-methods" title="Permalink to this headline">¶</a></h1> -<div class="section" id="information-from-executing-a-query"> -<h2>Information From Executing a Query<a class="headerlink" href="#information-from-executing-a-query" title="Permalink to this headline">¶</a></h2> -<p><strong>$this->db->insert_id()</strong></p> -<p>The insert ID number when performing database inserts.</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">If using the PDO driver with PostgreSQL, or using the Interbase -driver, this function requires a $name parameter, which specifies the -appropriate sequence to check for the insert id.</p> -</div> -<p><strong>$this->db->affected_rows()</strong></p> -<p>Displays the number of affected rows, when doing “write” type queries -(insert, update, etc.).</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">In MySQL “DELETE FROM TABLE” returns 0 affected rows. The database -class has a small hack that allows it to return the correct number of -affected rows. By default this hack is enabled but it can be turned off -in the database driver file.</p> -</div> -<p><strong>$this->db->last_query()</strong></p> -<p>Returns the last query that was run (the query string, not the result). -Example:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$str</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">last_query</span><span class="p">();</span> - -<span class="c1">// Produces: SELECT * FROM sometable....</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">Disabling the <strong>save_queries</strong> setting in your database -configuration will render this function useless.</p> -</div> -</div> -<div class="section" id="information-about-your-database"> -<h2>Information About Your Database<a class="headerlink" href="#information-about-your-database" title="Permalink to this headline">¶</a></h2> -<p><strong>$this->db->count_all()</strong></p> -<p>Permits you to determine the number of rows in a particular table. -Submit the table name in the first parameter. Example:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">count_all</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">);</span> - -<span class="c1">// Produces an integer, like 25</span> -</pre></div> -</div> -<p><strong>$this->db->platform()</strong></p> -<p>Outputs the database platform you are running (MySQL, MS SQL, Postgres, -etc…):</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">platform</span><span class="p">();</span> -</pre></div> -</div> -<p><strong>$this->db->version()</strong></p> -<p>Outputs the database version you are running:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">version</span><span class="p">();</span> -</pre></div> -</div> -</div> -<div class="section" id="making-your-queries-easier"> -<h2>Making Your Queries Easier<a class="headerlink" href="#making-your-queries-easier" title="Permalink to this headline">¶</a></h2> -<p><strong>$this->db->insert_string()</strong></p> -<p>This function simplifies the process of writing database inserts. It -returns a correctly formatted SQL insert string. Example:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> <span class="s1">'email'</span> <span class="o">=></span> <span class="nv">$email</span><span class="p">,</span> <span class="s1">'url'</span> <span class="o">=></span> <span class="nv">$url</span><span class="p">);</span> - -<span class="nv">$str</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert_string</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> -</pre></div> -</div> -<p>The first parameter is the table name, the second is an associative -array with the data to be inserted. The above example produces:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">INSERT</span> <span class="nx">INTO</span> <span class="nx">table_name</span> <span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">email</span><span class="p">,</span> <span class="nx">url</span><span class="p">)</span> <span class="nx">VALUES</span> <span class="p">(</span><span class="s1">'Rick'</span><span class="p">,</span> <span class="s1">'rick@example.com'</span><span class="p">,</span> <span class="s1">'example.com'</span><span class="p">)</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">Values are automatically escaped, producing safer queries.</p> -</div> -<p><strong>$this->db->update_string()</strong></p> -<p>This function simplifies the process of writing database updates. It -returns a correctly formatted SQL update string. Example:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> <span class="s1">'email'</span> <span class="o">=></span> <span class="nv">$email</span><span class="p">,</span> <span class="s1">'url'</span> <span class="o">=></span> <span class="nv">$url</span><span class="p">);</span> - -<span class="nv">$where</span> <span class="o">=</span> <span class="s2">"author_id = 1 AND status = 'active'"</span><span class="p">;</span> - -<span class="nv">$str</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update_string</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">,</span> <span class="nv">$where</span><span class="p">);</span> -</pre></div> -</div> -<p>The first parameter is the table name, the second is an associative -array with the data to be updated, and the third parameter is the -“where” clause. The above example produces:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">UPDATE</span> <span class="nx">table_name</span> <span class="nx">SET</span> <span class="nx">name</span> <span class="o">=</span> <span class="s1">'Rick'</span><span class="p">,</span> <span class="nx">email</span> <span class="o">=</span> <span class="s1">'rick@example.com'</span><span class="p">,</span> <span class="nx">url</span> <span class="o">=</span> <span class="s1">'example.com'</span> <span class="nx">WHERE</span> <span class="nx">author_id</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">AND</span> <span class="nx">status</span> <span class="o">=</span> <span class="s1">'active'</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">Values are automatically escaped, producing safer queries.</p> -</div> -</div> -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="query_builder.html" class="btn btn-neutral float-right" title="Query Builder Class">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="results.html" class="btn btn-neutral" title="Generating Query Results"><span class="fa fa-arrow-circle-left"></span> Previous</a> - - </div> - - - <hr/> - - <div role="contentinfo"> - <p> - © Copyright 2014 - 2018, British Columbia Institute of Technology. - Last updated on Jun 12, 2018. - </p> - </div> - - Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. - -</footer> - </div> - </div> - - </section> - - </div> - - - - - - <script type="text/javascript"> - var DOCUMENTATION_OPTIONS = { - URL_ROOT:'../', - VERSION:'3.1.9', - COLLAPSE_INDEX:false, - FILE_SUFFIX:'.html', - HAS_SOURCE: false - }; - </script> - <script type="text/javascript" src="../_static/jquery.js"></script> - <script type="text/javascript" src="../_static/underscore.js"></script> - <script type="text/javascript" src="../_static/doctools.js"></script> - - - - - - <script type="text/javascript" src="../_static/js/theme.js"></script> - - - - - <script type="text/javascript"> - jQuery(function () { - SphinxRtdTheme.StickyNav.enable(); - }); - </script> - - -</body> -</html>
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