Preview
IB DP Computer Science — A3 Databases — Database design | SL | A3.2.1
📋 What You Will Learn
- Define what a database schema is and how it differs from the data itself
- Describe the three schema levels: conceptual, logical and physical
- State what is decided at each level, and what each level deliberately ignores
- Explain how the levels are abstract definitions of the same data at different levels of detail
- Apply the three levels to a real scenario (a school enrolment database)
🏗️ Why This Matters An architect draws the same building three times: a concept sketch for the client, a floor plan for the engineers, and construction drawings for the builders. Each drawing