Database Systems, Do the database er diagram and answer part D
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
Related questions
Question
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.
Expert Solution
Step 1
The ER diagram for the COMPANY database is given in the next step.
Step by step
Solved in 2 steps with 1 images
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