Pick and Shovel Construction Company is a multistate building contractor specializing in medium-priced town homes. C. T. Scott, the owner, is in your office for the third time today to see how the new relational database project is coming along. Unfortunately, someone mentioned to C. T. that the delay had something to do with achieving normalization.
“Why is all this normalization stuff so important?” he asks. “The old system worked OK most of the time,and now you are telling me that we need all these special rules. Why is this necessary?”1. How should you respond to C. T.? Write him a brief memo with your views.
Assume that the Pick and Shovel’s main entities are its customers, employees, projects, and equipment. A customer can hire the company for more than one project, and employees sometimes work on more than one project at a time. Equipment, however, is assigned only to one project. Draw an crow’s feet ERD with Visio showing those entities. Add some attributes to the entities to make them meaningful.
3. Add cardinality notation to your ERD.
WHAT TO DO:
(1) Design your ERD with Lucidchart.