Drawing ER and EER Diagrams & Relational Mapping
A comprehensive introduction to ER & EER Hi Readers!😍 Today I am going to tell you how to draw ER and EER diagrams for your database and how to map them into relational schemas.🤞 Before that here are some things you should know. First Lets see what are ER and EER diagrams. What are the ER diagrams? ER diagram is a visual representation of data based on the ER model , and it describes how entities are related to each other in the database. What are EER diagrams? EER diagram is a visual representation of data, based on the EER model that is an extension of the original entity-relationship ( ER ) model . When you read this article you will find these words. ”Entity, Attribute, Relationship, Cardinality, and Participation” .🤔 Okay, Let’s see what are these. Entity An entity is any singular, identifiable and separate object. It refers to individuals, organizations, systems, bits of data or even distinct system componen...