Artists and Songs
Review the following structural business rules regarding artists and songs to complete this part.
An artist sings many songs.
A song is sung by one or more artists.
A song has a duration.
A genre applies to at least 15 songs.
1. The business rules above specify all of the relevant entities needed for this exercise. To get started, list the names of all entities provided in the business rules above.
2. The rules also specify all of the relevant relationships. Identify each relationship along with the entities it relates.
3. Some rules are not well formed in that they either do not describe both directions of the relationship, or they combine multiple relationships or entities into one statement. This can result in missing or ambiguous optionality and plurality constraints. Correct these rules by modifying them or adding new statements as necessary. You may make reasonable assumptions when doing so and there is no provably “right” list of assumptions; however, please state your assumptions.
4. Combine the original list of rules with your modifications to create a complete list of business rules. This combined list will not add additional entities, but will specify the optionality and plurality constraints for both sides of all relationships.
5. Create a conceptual entity-relationship diagram using Crow’s Foot notation that reflects your list of business rules. You may use Microsoft Visio Pro, Lucidchart, or another similarly capable drawing application to produce your ERD. Note that cardinalities are not required in the diagram, though relationship connectivity notations are required.