A. Key
B. Key revisited
C. Superset key
D. All of these
🧠 Explanation:
Functional dependencies in databases are constraints based on keys, ensuring data integrity. For tech students, this highlights database management, making it a key topic for studying computer science, data systems, and IT. Keys organize data. Understanding this ensures efficient database design. It’s essential for mastering database operations. Studying functional dependencies offers insights into how databases maintain consistency, crucial for IT, computer science, and data science.
