I have a field ,if user enters data it should go and check db if it is present it should redirect to next page.

But here i m not sure whether it is checking the db but mysql query is correct.

$ThirdPartyCategoryName =$_POST['ThirdPartyCategoryName'];

$activate = mysql_query("SELECT * FROM `thirdpartycategorymaster` WHERE `delete` =  'y' ");

if($activate=='y')
{
    header("location:catact.php");
}
else
{
    //$activate=='NULL';
    header("location:tp_home.php");
}