diff options
| author | admin <devnull@localhost> | 2006-09-24 19:59:33 +0200 |
|---|---|---|
| committer | admin <devnull@localhost> | 2006-09-24 19:59:33 +0200 |
| commit | fb28bb8d3bb01993e83126be028a1dda43422a39 (patch) | |
| tree | 874dda70bb048a55fa2783a1f1e3cfeea66f26f7 /user_guide/database/helpers.html | |
| parent | 5808346898ec9c602893fc54540958a8c556be29 (diff) | |
Adding database folder
Diffstat (limited to 'user_guide/database/helpers.html')
| -rw-r--r-- | user_guide/database/helpers.html | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/user_guide/database/helpers.html b/user_guide/database/helpers.html new file mode 100644 index 000000000..204116696 --- /dev/null +++ b/user_guide/database/helpers.html @@ -0,0 +1,142 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html>
+<head>
+
+<title>Code Igniter User Guide</title>
+
+<style type='text/css' media='all'>@import url('../userguide.css');</style>
+<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
+
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+<meta name='author' content='Rick Ellis' />
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+
+</head>
+<body>
+
+<!-- START NAVIGATION -->
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+<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle.jpg" width="153" height="44" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
+<div id="masthead">
+<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
+<tr>
+<td><h1>Code Igniter User Guide Version 1.4.1</h1></td>
+<td id="breadcrumb_right"><a href="../toc.html">Full Table of Contents</a></td>
+</tr>
+</table>
+</div>
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+<tr>
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+<a href="http://www.codeigniter.com/">Code Igniter Home</a> ›
+<a href="../index.html">User Guide Home</a> ›
+<a href="index.html">Database Library</a> ›
+Query Helpers
+</td>
+<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="www.codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
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+<!-- END BREADCRUMB -->
+
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+<br clear="all" />
+
+
+<!-- START CONTENT -->
+<div id="content">
+
+
+<h1>Query Helper Functions</h1>
+
+
+<h2>$this->db->insert_id()</h2>
+<p>The insert ID number when performing database inserts.</p>
+
+<h2>$this->db->affected_rows()</h2>
+<p>Displays the number of affected rows, when doing "write" type queries (insert, update, etc.).</p>
+</p>Note: 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>
+
+
+<h2>$this->db->version()</h2>
+<p>Outputs the database version you are running:</p>
+
+<code>echo $this->db->version();</code>
+
+<h2>$this->db->last_query();</h2>
+
+<p>Returns the last query that was run (the query string, not the result). Example:</p>
+
+<code>$str = $this->db->last_query();<br />
+<br />
+// Produces: SELECT * FROM sometable....
+</code>
+
+
+<p>The following two functions help simplify the process of writing database INSERTs and UPDATEs.</p>
+
+
+<h2>$this->db->insert_string(); </h2>
+<p>This function simplifies the process of writing database inserts. It returns a correctly formatted SQL insert string. Example:</p>
+
+<code>$data = array('name' => $name, 'email' => $email, 'url' => $url);<br />
+<br />
+$str = $this->db->insert_string('table_name', $data);
+</code>
+
+<p>The first parameter is the table name, the second is an associative array with the data to be inserted. The above example produces:</p>
+<code>INSERT INTO table_name (name, email, url) VALUES ('Rick', 'rick@your-site.com', 'www.your-site.com')</code>
+
+
+
+<h2>$this->db->update_string(); </h2>
+<p>This function simplifies the process of writing database updates. It returns a correctly formatted SQL update string. Example:</p>
+
+<code>$data = array('name' => $name, 'email' => $email, 'url' => $url);<br />
+<br />
+$where = "author_id = 1 AND status = 'active'";
+<br /><br />
+$str = $this->db->update_string('table_name', $data, $where);
+</code>
+
+<p>The first parameter is the table name, the second is an associative array with the data to be inserted, and the third parameter is the "where" clause. The above example produces:</p>
+<code> UPDATE exp_weblog SET name = 'Rick', email = 'rick@your-site.com', url = 'www.your-site.com' WHERE author_id = 1 AND status = 'active'</code>
+
+
+
+
+</div>
+<!-- END CONTENT -->
+
+
+<div id="footer">
+<p>
+Previous Topic: <a href="results.html">Query Results</a>
+ ·
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