EBK ESSENTIALS OF SYSTEMS ANALYSIS AND
6th Edition
ISBN: 9780133546392
Author: George
Publisher: VST
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Please describe what an entity-relationship model is as well as how it operates.
Please describe what an entity-relationship model is as well as how it functions.
Describe the primary components of an entity-relationship diagram, including entities, attributes, and relationships.
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- Explain what an entity-relationship model is and how it works.arrow_forwardPlease define entity-relationship modeling and describe its operation.arrow_forwardWhat differentiates a weak entity from a strong entity that is needed to have a connection with another entity is not immediately apparent.arrow_forward
- Please provide a definition of an entity-relationship model as well as an explanation of how it works.arrow_forwardExplain entity-relationship models and how they function.arrow_forwardWhat does cardinality indicate in an entity-relationship diagram? 1:The unique identification for which data is stored 2:The maximum number of entity instances for the connection 3:The total number of primary keys for an object. 4:The total number of features of an entityarrow_forward
- Describe the purpose and operation of an entity-relationship model.arrow_forwardDraw an EER diagram for the following situation using the traditional EER notation. A technology company provides offerings to its customers. Offerings are of two separate types: products and services. Offerings are identified by an offering ID and an attribute of description. In addition, products are described by product name, standard price, and date of first release; services are described by name of the company’s unit responsible for the service and conditions of service. There are repair, maintenance, and other types of services. A repair service has a cost and is the repair of some product; a maintenance service has an hourly rate. Fortunately, some products never require repair. However, there are many potential repair services for a product. A customer may purchase an offering, and the company needs to keep track of when the offering was purchased and the contact person for that offering with the customer. Unfortunately, not all offerings are purchased. Customers are…arrow_forwardERD should have a minimum of 10 entities, and ideally more. Entity-Relationship Diagram The subject could be an organization that you are employed with or an organization you are observing. Contact with representative from the particular organization is encouraged but not required. using LucidChart Develop business rules You should have at least 20 business rules.arrow_forward
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Enhanced Entity Relationship Model; Author: Data Science Center;https://www.youtube.com/watch?v=ocQUtXPumdQ;License: Standard YouTube License, CC-BY