laravel 4函数查询YEAR（列）出错

I am making a simple query request with a where condition. I need to have in this condition the year of a date field, in SQL i use "YEAR(date)=2015" In laravel when i use it, i get an error because he didnt find the column.

$total_num_rows_y = DB::table('insatisfaction')
  ->select(DB::raw('COUNT(id) as total_num_rows_y'))
  ->where('foo', $foo->id_aj)
  ->where('YEAR(date)', '2015')
  ->get();

Could you help me?

Let's try :

$total_num_rows_y = DB::table('insatisfaction')
   ->select(DB::raw('COUNT(id) as total_num_rows_y'))
   ->where('foo', $foo->id_aj)
   ->where(DB::raw('YEAR(start)'), '=', date('Y'));
   ->get();