A project is proposed to design a database for online shopping, in which data about shops, products and suppliers will be collected. Each online shop has a unique ID, name and owner. Each Owner has a unique ID and name. Different shops could be owned by the same owner. Each shop may sell several products, and each product has a price. The same product could be available at several online shops, but the price may vary from one shop to another. Each product has a number, name and description and supplied by a supplier. The product name identifies a product uniquely within the supplier. Each supplier has unique name and specializes in at least one specific category (Hair Care, Skin Care, Home). In addition, shops may have several contracts with different suppliers. For each contract, the start and end dates of the contract are documented. It is important for each supplier to keep the number of running contracts. Design an ER diagram for the above scenario, showing all attributes, keys, cardinalities and participation constraints clearly. Note any unspecified requirements, and make appropriate assumptions to make the specification complete. Do not add any attributes of your own.
A project is proposed to design a database for online shopping, in which data about shops, products and suppliers will be collected. Each online shop has a unique ID, name and owner. Each Owner has a unique ID and name. Different shops could be owned by the same owner. Each shop may sell several products, and each product has a price. The same product could be available at several online shops, but the price may vary from one shop to another. Each product has a number, name and description and supplied by a supplier. The product name identifies a product uniquely within the supplier. Each supplier has unique name and specializes in at least one specific category (Hair Care, Skin Care, Home). In addition, shops may have several contracts with different suppliers. For each contract, the start and end dates of the contract are documented. It is important for each supplier to keep the number of running contracts. Design an ER diagram for the above scenario, showing all attributes, keys, cardinalities and participation constraints clearly. Note any unspecified requirements, and make appropriate assumptions to make the specification complete. Do not add any attributes of your own.
Database Systems: Design, Implementation, & Management
12th Edition
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Carlos Coronel, Steven Morris
Chapter9: Database Design
Section: Chapter Questions
Problem 7P
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Transcribed Image Text:QUESTION 1
A project is proposed to design a database for online shopping, in which data about shops, products and suppliers will be collected. Each
online shop has a unique ID, name and owner. Each Owner has a unique ID and name. Different shops could be owned by the same owner.
Each shop may sell several products, and each product has a price. The same product could be available at several online shops, but the price
may vary from one shop to another. Each product has a number, name and description and supplied by a supplier. The product name
identifies a product uniquely within the supplier. Each supplier has unique name and specializes in at least one specific category (Hair Care,
Skin Care, Home). In addition, shops may have several contracts with different suppliers. For each contract, the start and end dates of the
contract are documented. It is important for each supplier to keep the number of running contracts.
Design an ER diagram for the above scenario, showing all attributes, keys, cardinalities and participation constraints clearly. Note any
unspecified requirements, and make appropriate assumptions to make the specification complete. Do not add any attributes of your own.
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