Suppose you are given the following requirement for a simple database for the employee management system: 1. An employee may work in up to two departments or may not be assigned to any department. 2. Each department must have one and may have up to three phone numbers. 3. Each department can have anywhere between 1 and 30 employees. 4. Each phone is used by one, and only one department. 5. Each phone is assigned to at least one, and may be assigned to up to 30 employees. 6. Each employee is assigned at at least one, but not more than 5 phones. Construct a clean and concise ER diagram for the database. Clearly indicate the cardinality mappings.

Suppose you are given the following requirement for a simple database for the employee management system: 1. An employee may work in up to two departments or may not be assigned to any department. 2. Each department must have one and may have up to three phone numbers. 3. Each department can have anywhere between 1 and 30 employees. 4. Each phone is used by one, and only one department. 5. Each phone is assigned to at least one, and may be assigned to up to 30 employees. 6. Each employee is assigned at at least one, but not more than 5 phones. Construct a clean and concise ER diagram for the database. Clearly indicate the cardinality mappings.

Database Systems: Design, Implementation, & Management

11th Edition

ISBN:9781285196145

Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Chapter10: Transaction Management And Concurrency Control

Section: Chapter Questions

Problem 1P

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