Student Grade Management System (Challenge)

# Introduction

In this challenge, we will create a student information table and a student score table, and establish a foreign key constraint relationship. Given the relational database example of student_info(Id, name) and student_score(Id, score, Sid), the task is to create the database and tables, and ensure the foreign key constraint is correctly implemented. You need to write a script file called `studentSys.sql` and save it in the directory `~/project`. The script should be run in MySQL using the command `SOURCE ~/project/studentSys.sql`. Verify the results by checking the structure of the tables.