Exercise #23

What is entity relationship diagram design: 

An entity relationship diagram (ERD), often called an entity relationship model, is a graphical depiction of relationships between people, things, locations, concepts, and events in an information technology (IT) system.






What is entity relationship diagram with example:

An entity is a type of data item or component. In an ER diagram, an entity is represented by a rectangle. Consider the following scenario: We have two entities in the following ER diagram: Student and College, and these two entities have a many to one connection since many students attend a single college.





















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Exercise #1

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