Information Technology IT – 10 Database and file concepts | e-Consult
10 Database and file concepts (1 questions)
The database relationship to represent this situation is a many-to-many relationship. Students can enroll in many courses, and each course can have many students enrolled. A one-to-many or many-to-many relationship would not accurately represent this scenario.
To implement this relationship, a junction table (also known as an associative table or linking table) is required. This table will bridge the relationship between the Students and Courses tables.
The junction table would have the following structure:
| StudentID (Foreign Key referencing Students.StudentID) | CourseID (Foreign Key referencing Courses.CourseID) | EnrollmentDate |
Students Table: (StudentID (Primary Key), StudentName, StudentID)
Courses Table: (CourseID (Primary Key), CourseName, CourseCode)
The StudentID and CourseID in the junction table form a composite primary key, ensuring that each enrollment record is unique. The foreign keys link the junction table to the Students and Courses tables, maintaining referential integrity.