Consider the schema R=ABCDEG and the set of functional dependencies F={BC→AG, BG→CD, C→AE, D→AG} 2a) Determine the keys of the schema 2b) Decide whether the schema is 3NF and motivate your answer 2c) Find a decomposition of the schema such that: - every subschema is 3NF - preserves the dependencies - has a lossless join.
Consider the schema R=ABCDEG and the set of functional dependencies F={BC→AG, BG→CD, C→AE, D→AG} 2a) Determine the keys of the schema 2b) Decide whether the schema is 3NF and motivate your answer 2c) Find a decomposition of the schema such that: - every subschema is 3NF - preserves the dependencies - has a lossless join.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider the schema R=ABCDEG and the set of functional dependencies
F={BC→AG, BG→CD, C→AE, D→AG}
2a) Determine the keys of the schema
2b) Decide whether the schema is 3NF and motivate your answer 2c) Find a decomposition of the schema such that:
- every subschema is 3NF
- preserves the dependencies
- has a lossless join.
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