Introduction - If you have any usage issues, please Google them yourself
Add function: add the data information, when a new student enters is the information that can be added to the student.
Accurate inquiry: input to inquire the student's school number, show the student's information.
Delete function: this function and accurate query function are implemented in the same function module and used to delete students' information.
Modify the function: when the information of the students change, use this function to update the students' information.