สอบถามเรื่องการส่งค่าจากการกดปุ่มไป ajax และให้ ajax ส่งค่าไปอัพเดทใน mysql

echo "	<td id='row".$i."Col3' name='row".$i."Col3'>";
$btnLabel = ($rows[$i]["Approve"]='0' || $rows[$i]["Approve"]>0) ? "$update" : "$buttonsubmit";
echo "		<button id='buttonRow".$i."' name='buttonRow".$i."' type='button' onclick='checkclick(".$rows[$i]["UID"].",selectvalueRow".$i."Col1,".$rows[$i]["CreateDate"].",checkclickRow".$i.")' class='btn btn-primary waves-effect' style='width:70px; height:24px'>".$btnLabel."</button>";

function checkclick(UID, Approve, CreateDate, checkclickID) {	
				$.ajax({
					type: "POST",
					url: "ajax-update.php",
					data: { UID: UID , Approve: Approve, CreateDate: CreateDate},
					async: false, 
					success: function(data){
						if(data==true){
							$('#'+checkclickID).html('<?php echo $update ?>');
						}else{
							alert("An error occurred");
						}
					},
					error: function(){
						alert("An error occurred");
					}
				});				
			};

list($day, $month, $year) = explode("/", $_POST["CreateDate"]);
	$filterDate2 = "".$year."/".$month."/".$day."";
	$conn = PDOConnector();
	$comm = "UPDATE transection SET ";
			$comm .= "Approve = :Approve ";
			$comm .= "WHERE UID = :UID AND DATE(transection.CreateDate) =:CreateDate";
			
	$query = $conn->prepare($comm);
			
	$result = $query->execute(array(
		"Approve" => $_POST["approve"],
		"CreateDate" =>  $filterDate,
		"UID" => $_POST["UID"]
	));