public function ormUpdate()
{
# 1.通過模型更新數據
/* $student = Student::find(14);
$student->name = '小卡';
$student->save(); */
# 2.結合查詢批量更新
$student = Student::where('id',14)
->where('name','小卡')
->update(['name' => '老卡']);
}