Question

I’m trying to join one table to another on one condition, and then the table to another table on another condition. Can you do this and if so what is the correct syntax? I’ve been trying this but it doesn’t work:

$check = $members->prepare("select users.fname, users.lname, groups.groupid, attributes.max 
    from users 
    JOIN groups 
         on users.user_id = groups.userid 
    where groups.userid = ? 
    LEFT JOIN attributes 
         on users.user_id = attributes.userid 
    where attributes.groupid = ?");
$check->bind_param('ss', $_SESSION['token'][1], $which_group);
$check->execute();

cheers.

Answer 1

Just use…….. AND

$check = $members->prepare("select users.fname, users.lname, groups.groupid, attributes.max 
    FROM users 
    JOIN groups 
         ON users.user_id = groups.userid 
         AND groups.userid = ? 
    LEFT JOIN attributes 
         ON users.user_id = attributes.userid 
         AND attributes.groupid = ?