Do $wpdb->insert(..) and $wpdb->update(..) automatically sanitize data?

I'm trying to ensure that I avoid any SQL injections so I'm curious how WordPress handles these types of situations. I would like to use the WordPress wrapper to insert new values into the database. Say I have the following snippet: ``` <?PHP $var = $_POST['var']; $qry = $wpdb->insert( 'my_table', array( 'var' => $var, 'column2' => 123 ) ); if ($qry) { $new_record = $wpdb->insert_id; echo 'Record was inserted successfully with an id of ' . $new_record_id; } else { echo "There was an error with the SQL query"; } ?> ``` I looked into the WordPress Codex and it says not to escape these values but I want to ensure that I'm not leaving myself open to SQL injections. Am I protected or is there anything else I need to do? Do I have to worry about Select statements as well? Here is the Codex for reference: http://codex.wordpress.org/Class_Reference/wpdb Thanks in advance!