DATABASE FUNDAMENTALS
WHAT IS DATABASE MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Entity instance or entity occurrence
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The Entity Relationship Model
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Entity relationship diagram (ERD)
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None of the above
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Detailed explanation-1: -ERD stands for entity relationship diagram. People also call these types of diagrams ER diagrams and Entity Relationship Models. An ERD visualizes the relationships between entities like people, things, or concepts in a database. An ERD will also often visualize the attributes of these entities.
Detailed explanation-2: -An entity relationship diagram (ERD), also known as an entity relationship model, is a graphical representation that depicts relationships among people, objects, places, concepts or events within an information technology (IT) system.
Detailed explanation-3: -ER models, also called an ER schema, are represented by ER diagrams. ER modelling is based on two concepts: Entities, defined as tables that hold specific information (data) Relationships, defined as the associations or interactions between entities.
Detailed explanation-4: -The entity relationship model (ERM) is a conceptual model that represents the information structure of a problem domain in terms of entities and relationships. The result of modeling using the ERM is graphically represented as an entity relationship diagram (ERD).
Detailed explanation-5: -Entity. Entities are represented by means of rectangles. Rectangles are named with the entity set they represent.