Laravel统计一段时间间隔的数据

$days = Input::get('days', 7);

$range = \Carbon\Carbon::now()->subDays($days);

$stats = User::where('created_at', '>=', $range)
->groupBy('date')
->orderBy('date', 'DESC')
->get([
DB::raw('Date(created_at) as date'),
DB::raw('COUNT(*) as value')
]);

SELECT
sum(case when `EmailSource`='FM' then 1 else 0 end) as FM_Statistic,
sum(case when `EmailSource`='UOC' then 1 else 0 end) as UOC_Statistic,
sum(case when `EmailSource`='OC' then 1 else 0 end) as OC_Statistic,
DATE_FORMAT(Date,'%Y-%m-%d') AS `DateTime`
FROM `user_performance`
WHERE Email != '' AND Email != 'TOTAL'
AND (DATE_FORMAT(Date,'%Y-%m-%d') >= DATE_FORMAT('2011-02-5','%Y-%m-%d'))
AND (DATE_FORMAT(Date,'%Y-%m-%d') <= DATE_FORMAT('2011-03-07','%Y-%m-%d'))
GROUP BY `Date`