how to display AND and OR conditions IN QUERY

[ditditsasa]

MY CODE FOR THIS IS CORRECT?TELL ME

function fetchCancel_noshow( $from_date, $to_date, $patient_id = null, $provider_id = null, $apptstatus_id = null )
{

	$where = "";
	if ( $provider_id ) {
	$where .= " AND e.pc_aid = '$provider_id'";
	if ( $patient_id )  {
		$where .= " AND e.pc_pid = '1'";
		
		$apptstatus_filter = " AND e.pc_apptstatus = ('!' OR '@')";
		$where .= $apptstatus_filter;
		} 
	else {
		$where .= " AND e.pc_pid != ''";
		} 
		}
		$apptstatus_filter = " AND (e.pc_apptstatus ='!' OR e.pc_apptstatus ='@')";
		$where .= $apptstatus_filter;
							
	$appointments = fetchEvents( $from_date, $to_date, $where );
	return $appointments;
}

THANKYOU IN ADVANCE

[Rabbit]

Please use code tags when posting code.

You're the one that has to tell us if your code is correct or not. We don't know your business requirements, so there's no way for us to know. And if it's incorrect, you have to tell us what is incorrect. What is it doing that it's not supposed to and vice versa. What are the error codes and messages that you're getting?