📘 database design
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Person Supertype C40105
1. **State the problem:**
We need to refactor the database schema by creating a new supertype table `person` that holds common columns from `customer` and `staff` tables, then adju
Er Diagram 99A0Bf
1. Problem: Draw an E–R diagram for a Student–Course system showing enrolment relationship.
2. Explanation: An E–R (Entity-Relationship) diagram visually represents entities and th