Update Status Question

Hello: I have this line: $sql = "Update Members Set Active='Y' where Username = '$_GET[UN]' And ActiveCode = '$_GET[ID]'"; Is there a php function that will return true or false or something when this is processed. I.E. if the Where clause fails it would report back fail? Or do I first need to check the status with a select? Thank you, Mike Walth CinoFusion