Wild Wood Apartments The managers at Wild Wood Apartments are anxious to see som
Wild Wood Apartments
The managers at Wild Wood Apartments are anxious to see some progress on their database. They have answered your questions and now want to see some results. They really want the new database to be in place before the beginning of the new fiscal year in July. It is time to design the database.
1. Review all the requirements and business rules.
2. Define your entities and attributes and the relations that exist between them.
3. Create a logical model using crow’s feet notation in Visio
4. Add all the entities and their attributes. You don’t need to worry about data types for now.
5. Identify the key fields for each entity and the foreign keys.
6. Analyze the diagram. Identify which role (i.e., domain, linking, lookup, or weak) each entity plays in your database.
7. review it for yourself the following:
* Are all the major components of the Wildwood Apartments business model represented by domain entities?
* Does each entity contain the appropriate attributes to fully describe it and meet the business rules you have gathered so far?
* Does every entity have an appropriate primary key defined?
* Are all many-to-many relationships resolved into one-to-many relationships by linking tables?
* Are the relationships valid (no cross relationships)? Is the appropriate entity is defined as the one side of a one-to-many relationship? Do the tables have appropriate foreign keys? Also check for other such issues.
* Are lookup tables used for attributes that have a set list of values?
8. Documentation: Be sure to store your ERDs in your database notebook.