Page - 2 A company makes items. Each item has a name, ID and component quantity. Every item contains many components. Each component can be supplied by one or more suppliers. Suppliers have names and IDS. Each component has ID, name, description, suppliers who supply them, and items in which they are used. Not all suppliers provide components, and a component is not always associated with a supplier. Also, a component always have to be associated with one or more items. Finally, the company contact customers using their IDs, Names and Phones to sell them items. A customer can buy one or more items.
Page - 2 A company makes items. Each item has a name, ID and component quantity. Every item contains many components. Each component can be supplied by one or more suppliers. Suppliers have names and IDS. Each component has ID, name, description, suppliers who supply them, and items in which they are used. Not all suppliers provide components, and a component is not always associated with a supplier. Also, a component always have to be associated with one or more items. Finally, the company contact customers using their IDs, Names and Phones to sell them items. A customer can buy one or more items.
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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Question
Represent the company description as An ER-diagram
Transcribed Image Text:Page - 2
A company makes items. Each item has a name, ID and component quantity.
Every item contains many components. Each component can be supplied by one
or more suppliers. Suppliers have names and IDS. Each component has ID, name,
description, suppliers who supply them, and items in which they are used. Not all
suppliers provide components, and a component is not always associated with a
supplier. Also, a component always have to be associated with one or more items.
Finally, the company contact customers using their IDs, Names and Phones to sell
them items. A customer can buy one or more items.
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