Question

Which of the following can be found in an ERD?

a. Tables and Instances.
b. Entities and Instances
c. Tables and Attributes
d. Entities and Attributes.

Answer 1

An ERD (Entity-Relationship Diagram) is used to visually represent the structure and relationships of a database. In an ERD, you can find entities and their attributes.

Step-by-step explanation:

An ERD (Entity-Relationship Diagram) is used to visually represent the structure and relationships of a database. In an ERD, you can find entities and their attributes. Entities are the objects or concepts that are represented in a database, while attributes describe the properties of those entities.

For example, if you were creating an ERD for a school database, one entity could be 'Student', and its attributes could include 'Name', 'Age', and 'Grade'.

There are no instances or tables in an ERD. Instances refer to specific occurrences of entities, while tables are the physical representation of entities in a database.