Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Question
Database Systems, Do the database er diagram and answer part D
1. Your task is to design a 'Company' database capable of storing information about EM- PLOYEE(s), DEPARTMENT(s), and PROJECT(s). Knowing that: 2. . We store each employee's name (composite attribute - social security number, address, salary, and telephone number. An employee is assigned to one department, but may work on several projects which are not necessarily controlled by the same department. We keep track of the number of hours that an employee works on each project - • Each department has a unique name, ja unique number, a single location, and a particular employee when that who manages - the department. We keep track of the start date - employee began managing the department A department controls a number of projects, each of which has a unique name, a unique number and several locations. (a) { Give the ER diagram and schema Which type of relationships do you have? Discuss both the cardinality and the partici- pation constraints Give the corresponding relational schema; and Give a snapshot containing at least 5 entrances (better if mean full). Primary, candidate and foreign keys: what are them? Give examples (refering to answer 1) Resource: Chapter1, par.2.1, chapter3 (Data Modeling using the ER model) and Chapter 7 (Relational Database design by ER and EER to Relational Mapping) of the Elmasri & Navathe book.
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Transcribed Image Text:1. Your task is to design a 'Company' database capable of storing information about EM- PLOYEE(s), DEPARTMENT(s), and PROJECT(s). Knowing that: 2. . We store each employee's name (composite attribute - social security number, address, salary, and telephone number. An employee is assigned to one department, but may work on several projects which are not necessarily controlled by the same department. We keep track of the number of hours that an employee works on each project - • Each department has a unique name, ja unique number, a single location, and a particular employee when that who manages - the department. We keep track of the start date - employee began managing the department A department controls a number of projects, each of which has a unique name, a unique number and several locations. (a) { Give the ER diagram and schema Which type of relationships do you have? Discuss both the cardinality and the partici- pation constraints Give the corresponding relational schema; and Give a snapshot containing at least 5 entrances (better if mean full). Primary, candidate and foreign keys: what are them? Give examples (refering to answer 1) Resource: Chapter1, par.2.1, chapter3 (Data Modeling using the ER model) and Chapter 7 (Relational Database design by ER and EER to Relational Mapping) of the Elmasri & Navathe book.
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The ER diagram for the COMPANY database is given in the next step.

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