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36<td><h1>Code Igniter User Guide Version 1.4.1</h1></td>
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51Query Helpers
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67<h1>Query Helper Functions</h1>
68
69
70<h2>$this->db->insert_id()</h2>
71<p>The insert ID number when performing database inserts.</p>
72
73<h2>$this->db->affected_rows()</h2>
74<p>Displays the number of affected rows, when doing "write" type queries (insert, update, etc.).</p>
75</p>Note: In MySQL "DELETE FROM TABLE" returns 0 affected rows. The database class has a small hack that allows it to return the
76correct number of affected rows. By default this hack is enabled but it can be turned off in the database driver file.</p>
77
78
admind125c5c2006-09-25 23:26:12 +0000[diff] [blame^]79<h2>$this->db->platform()</h2>
80<p>Outputs the database platform you are running (MySQL, MS SQL, Postgre, etc...):</p>
81<code>echo $this->db->platform();</code>
82
83
adminfb28bb82006-09-24 17:59:33 +0000[diff] [blame]84<h2>$this->db->version()</h2>
85<p>Outputs the database version you are running:</p>
adminfb28bb82006-09-24 17:59:33 +0000[diff] [blame]86<code>echo $this->db->version();</code>
87
adminfb28bb82006-09-24 17:59:33 +0000[diff] [blame]88
admind125c5c2006-09-25 23:26:12 +0000[diff] [blame^]89
90<h2>$this->db->last_query();</h2>
adminfb28bb82006-09-24 17:59:33 +0000[diff] [blame]91<p>Returns the last query that was run (the query string, not the result). Example:</p>
92
93<code>$str = $this->db->last_query();<br />
94<br />
95// Produces: SELECT * FROM sometable....
96</code>
97
98
99<p>The following two functions help simplify the process of writing database INSERTs and UPDATEs.</p>
100
101
102<h2>$this->db->insert_string(); </h2>
103<p>This function simplifies the process of writing database inserts. It returns a correctly formatted SQL insert string. Example:</p>
104
105<code>$data = array('name' => $name, 'email' => $email, 'url' => $url);<br />
106<br />
107$str = $this->db->insert_string('table_name', $data);
108</code>
109
110<p>The first parameter is the table name, the second is an associative array with the data to be inserted. The above example produces:</p>
111<code>INSERT INTO table_name (name, email, url) VALUES ('Rick', 'rick@your-site.com', 'www.your-site.com')</code>
112
113
114
115<h2>$this->db->update_string(); </h2>
116<p>This function simplifies the process of writing database updates. It returns a correctly formatted SQL update string. Example:</p>
117
118<code>$data = array('name' => $name, 'email' => $email, 'url' => $url);<br />
119<br />
120$where = "author_id = 1 AND status = 'active'";
121<br /><br />
122$str = $this->db->update_string('table_name', $data, $where);
123</code>
124
125<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>
126<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>
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