DATABASE SYSTEM CONCEPTS LCPO
7th Edition
ISBN: 9781265586577
Author: SILBERSCHATZ
Publisher: MCG
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Chapter 8, Problem 10E
Explanation of Solution
Consider the
Redesigning the database into first normal form:
- A relation schema is said to be in First Normal Form (1NF) when the domains of all attributes in the schema are atomic.
- Thus, all the attributes of given schema need to be flattened into a single relation schema to make it into 1NF.
- So, the schema is as follows:
Emp_details= (ename, name, birthday, type, year, city)
- The functional dependencies and multi-level dependencies are as follows:
- ename, name -> birthday
- A child has a unique birth date.
- Ename -> name, birthday
- An employee cannot have two children of the same name.
- ename, type -> year, city
- No relationship exists between the children of an employee and his skill set details...
- ename, name -> birthday
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Chapter 8 Solutions
DATABASE SYSTEM CONCEPTS LCPO
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