I am using left join query in my php script. The code which i am using is
$tot = "SELECT
                        c.id,
                        c.name AS companyname,
                        m.companyid,
                        m.name AS naam
                        FROM
                        org c
                        LEFT JOIN login m ON c.id = m.companyid
                    ";
        $query = $con->query($tot);
        $total = $query->num_rows;
it is giving this error to me "Notice:  Trying to get property of non-object in on line $total = $query->num_rows;
"
But when i am using this line of code it is giving total num of rows easily to me. The code i am using is
$tot = "SELECT * FROM org GROUP BY id ORDER BY dateadded DESC";
        $query = $con->query($tot);
        $total = $query->num_rows;
        echo $total;
it is working absolutely fine. SO what is the wrong thing i am doing in above code.
