LARAVEL 按照时段统计今天、7天、30天的数据(统计图)

[laravel数据统计绘图（今天、7天、30天数据）]

$time = 7;
$data_arr = Info::where('created_at','<', Carbon::now())
                ->where('created_at','>', $time > 1 ? Carbon::today()->subDays($time):Carbon::today())
                ->select([$time > 1 ? DB::raw('DATE(created_at) as time') : DB::raw('DATE_FORMAT(created_at,\'%H\') as time'), DB::raw('COUNT("*") as count')])
                ->groupBy('time')
                ->get();