Stan - 2015-12-08

I am getting this error
Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in /home/sarnold/public_html/timeclock/display.php on line 6

display.php

Line 6 while($row = mysql_fetch_array($result))
$display_stamp = "".$row["timestamp"]."";
$time = date($timefmt, $display_stamp);
$date = date($datefmt, $display_stamp);

Anyone know how to fix this error? Thanks