在模型中也可以調(diào)用數(shù)據(jù)庫的聚合方法進(jìn)行查詢，例如：

靜態(tài)調(diào)用：

User::count();
User::where('status','>',0)->count();
User::where('status',1)->avg('score');
User::max('score');

動態(tài)調(diào)用：

$user = new User;
$user->count();
$user->where('status','>',0)->count();
$user->where('status',1)->avg('score');
$user->max('score');