title: Subquery returns more than 1 row PHP MYSQL
body: <pre><code>"SELECT mrk_lat,client_id,mrk_lng ,engine_status ,created_date,live_fuel,
  (SELECT count(veh_id) FROM we_vehicles) as total_veh,
  (SELECT count(veh_status) FROM we_vehicles WHERE veh_status=1) as run_veh,
  (SELECT count(veh_status) FROM we_vehicles WHERE veh_status=0) as stop_veh,
  (SELECT client_id FROM we_clients)
  FROM `we_vehicles_coordinates` WHERE client_id = ".$_SESSION['client_id'];
  </code></pre>
  
  <p>ERROR is :
  <code>Warning: mysqli_query(): (21000/1242): Subquery returns more than 1 row</code></p>
  
  <p>Everything is looks good. But when i add the <code>we_clients</code> table, It gives me that ERROR.</p>
  
  <p>Thanks</p>