function insert_interests($uid, $interests) {
/* first, we'll delete any entries this user already has in the table */
	purge_lookup("jss_users_interests_table", $uid);
/* now create the sql insert query */
	global $db;
	$db->query(create_checkbox_query($interests, "jss_users_interests_table", $uid));
}
/* helper function for insert_interests(). removes all rows in $table with $uid */
function purge_lookup($table, $uid) {
	global $db;
	$db->query("DELETE FROM $table WHERE users_id = '".$db->escape($uid)."'");
}
/* helper function for insert_interests(). generates the actual SQL query */
function create_checkbox_query($arr, $table, $uid) {
	$q = "INSERT INTO $table (users_id, subcategories_id) VALUES";
	foreach ($arr as $check) {
	$q .=  " ( '$uid' , $check )" . ",";
	}
/* remove the last comma and return */
return substr($q, 0, -1);
}`

INSERT INTO jss_info_requests_table
 (users_id, provider_id, subcategories_id)
SELECT a.users_id,
 b.provider_id, b.subcategories_id FROM
 jss_users_interests_table a,
 jss_providers_assignments_table b
 WHERE a.subcategories_id =
 b.subcategories_id AND a.users_id =
 [USERID]