Laravel 8 havingRaw / orHavingRaw

havingRaw 和 orHavingRaw 方法可以用于将原生字符串设置为 having 语句的值：

$orders = DB::table('orders')
                ->select('department', DB::raw('SUM(price) as total_sales'))
                ->groupBy('department')
                ->havingRaw('SUM(price) > ?', [2500])
                ->get();