อยากดึงข้อมูลออกมาแสดงเฉพาะวันนี้ แล้วสามารถเลือกดูวันก่อนๆ ได้ด้วย ต้องทำอย่างไรครับ

      <?php
$sql="select * from `".$tb_prefix."withdraw` Order by WithdrawID DESC  limit 50 ";
$result=mysql_db_query($dbName,$sql);
while ($record=mysql_fetch_array($result)){
$WithdrawID=$record[WithdrawID];
$Username=$record[Username];
$Name=$record[Name];
$Web=$record[Web];
$Password=$record[Password];
$Bank=$record[Bank];
$BankID=$record[BankID];
$BankAcc=$record[BankAcc];
$Amount=$record[Amount];
$Staff=$record[Staff];
$DateTime=$record[DateTime];


echo"	
<table width=\"1200\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\">


<tr>
			<td width=\"50\" class=\"f7\" align=\"center\">$WithdrawID</td>
			<td width=\"100\" class=\"f7\" align=\"center\"><b>$Username</b></td>
			<td width=\"100\" class=\"f7\" align=\"center\"><b>$Name</b></td>
			<td  width=\"100\" class=\"f7\" align=\"center\"><b>$Web</b></td>
			<td  width=\"100\" class=\"f7\" align=\"right\"><b>$Amount</b></td>
			<td  width=\"100\" class=\"f7\" align=\"center\"><b>$Password</b></td>
			<td  width=\"100\" class=\"f7\" align=\"center\"><b>$Bank</b></td>
			<td  width=\"150\" class=\"f7\" align=\"center\"><b>$BankID</b></td>
			<td  width=\"150\" class=\"f7\" align=\"center\">$BankAcc</td>
			<td  width=\"150\" class=\"f7\" align=\"center\">$DateTime</td>
			<td  width=\"100\" class=\"f7\" align=\"center\">$Staff</td>
</tr>
</table>

		";
}
 	?>