I am designing database for a school app. Student is the main entity in the database. Student has relation with Parent & Guardian.
I am confused as where to store references. As will student table have foreign keys from parent & guardian table or vice versa.
UPDATE: Need to store student current data like course / batch / roll no etc which keeps on changing. For this purpose I am creating a new table student_current to store the current data with one to many relation from student to student_current table. At any time, i need to create a join with student_current table to fetch latest student_current record. To improve performance, I am storing primary key of student_current table as foreign key in student table and then making a simple join on this to fetch data. Is this approach right??
Also would appreciate your help in suggesting how to store revisions for student data.
Current schema is like:
student { id, student_current_id, name .... }student_current { id, student_id, course .... }Please help.