求相关联表的列组成的数组 计算等

   $lists_browse_sum = Auth::user()->nets()->lists('browse_num');//形成的一维数组
   $sum_browse_sum = Auth::user()->nets()->sum('browse_num');//把这个一维数组进行讲算
   $sum_click_num = Auth::user()->nets()->sum('total_click_num');
   return view('nets.statistics',compact('sum_browse_sum','sum_click_num'));
   }