No, no me funciona sacandole los ()
Aqui esta la query completa
Código PHP:
$query = "SELECT ddjj_rectificativa FROM ddjj";
$rs = mysql_query($query);
$rs1 = mysql_fetch_assoc($rs);
if(isset($rs1)){
echo "<option value='0'>0</option>";
}elseif($rs1 == 0){
echo "<option value='1'>1</option>";
}