Suppose that Heather Sweeney wants to include records of her consulting services in her database. Extend the data model in Figure 4-21(c) to include CONSULTING_ PROJECT and DAILY_PROJECT_HOURS entities. CONSULTING_PROJECTcontains data about a particular project for one of Heather’s customers, and DAILY_PROJECT_HOURS contains data about the hours spent and a description of the work accomplished on a particular day for a particular project. Use strong and/or weak entities, as appropriate. Specify minimum and maximum cardinalities. Use the IE Crow’s Foot E-R model for your E-R diagrams.

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
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Suppose that Heather Sweeney wants to include records of her consulting services in her database. Extend the data model in Figure 4-21(c) to include CONSULTING_ PROJECT and DAILY_PROJECT_HOURS entities. CONSULTING_PROJECT
contains data about a particular project for one of Heather’s customers, and DAILY_PROJECT_HOURS contains data about the hours spent and a description of the work accomplished on a particular day for a particular project. Use strong and/or weak entities, as appropriate. Specify minimum and maximum cardinalities. Use the IE Crow’s Foot E-R model for your E-R diagrams.

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