Question

Create an Entity-Relationship Diagram with the following requirements:

A. There are Professors (ie users) with the changeable attributes Professor_Name, Field, College, PhD_Date
B. There are Flubs (ie posts) with the unchangeable attributes Content, Purpose, Moment, Inventor (which is the creating Professor)
C. There are Bounces (ie shares) where a Professor can share another Professor's Flub
D. Add ID attributes as necessary
E. Content of Flubs only needs to be a text of fixed length
F. Professors can have/be Colleagues (ie friends/followers)
G. A Flub can get Citations (ie likes) by other Professors

Answer 1

The student is requesting the construction of an Entity-Relationship Diagram for a database involving Professors, Flubs (posts), and Bounces (shares). Professors have multiple attributes and can engage with Flubs in various ways including creating, sharing, and liking them. An ERD will visually represent these entities, their attributes, and the relationships between them.

Step-by-step explanation:

The student is asking to create an Entity-Relationship Diagram (ERD) that represents a social platform scenario with certain requirements. An ERD is a tool used in database modeling to illustrate the interrelationships between entities within a database.

In this scenario, Professors are users who can create Flubs (posts) and Bounces (shares). Professors have changeable attributes like Professor_Name, Field, College, and PhD_Date. Flubs have fixed attributes such as Content, Purpose, Moment, and Inventor, with the content being text of fixed length. Professors can share Flubs via Bounces, have colleagues, and give Citations (likes) to Flubs.

When constructing the ERD, each entity would be represented by a rectangle, with Professor, Flub, and Bounce as the primary entities. Attributes would be listed in ovals connected to their respective entities, and relationships would be represented by lines connecting the entities, with diamond shapes to denote the nature of the relationship, such as 'creates', 'shares', or 'cites'. Additionally, each entity should have an ID attribute to uniquely identify each record in the database.