Entity relationships. Describe relational databases and their use

1. Entity Relationships

describe relational databases
and their use

2.

When developing databases, the "entityrelationship" model is used.

3.

4.

5.

Entity relationship diagrams are used to show how entities are related to
each other. A relationship is represented as a line between boxes that
represent the entities that are linked.

6.

7.

8.

http://www.cpanel.stpaulsscience.org/gceict/specifications/aqa/unit3/devsolutions/ermodel/intro.htm
https://metanit.com/web/php/7.1.php