public function ormDelete()
{
# 1.通過模型刪除
// $student = Student::where('id',5);
// $student->delete();
# 2.通過主鍵值刪除
## 2.1 刪除單個
// Student::destroy(14);
## 2.4 刪除多個
// Student::destroy(11,13);
// Student::destroy([1,4]);
# 3.根據指定條件刪除
Student::where('id',3)->delete();
}