Database Management System208210 marksER diagram purpose and symbols
What is the need for an ER diagram? Design an ER diagram that contains at least five entities. One of the entities must be a weak entity. There should be many to many relationships between the two strong entities. One of the entities should have derived and multi-valued attributes. Any one strong en
What is the need for an ER diagram? Design an ER diagram that contains at least five entities. One of the entities must be a weak entity. There should be many to many relationships between the two strong entities. One of the entities should have derived and multi-valued attributes. Any one strong entity should have total participation in a relationship with another entity. Use your own assumptions as per required.[10]
--- An Entity-Relationship (ER) Diagram is a high-level conceptual data model that graphically represents the structure of a database. The need for an ER diagram arises due to the following reasons: 1. Visual Representation of Data: It provides a clear, pictorial view of the database structure, m...