| description | examples | database part | ER diagram symbol | |
|---|---|---|---|---|
| entity |
The "noun":
An object with a distinct set of attributes. The building blocks of the database. |
student
course grade |
table |
|
| attribute |
The "adjective":
A property of an entity that makes it different from other entities — information about the entity. |
student id
student name course id |
field |
|
| relationship |
The "verb":
The association between entities. |
"studies":
The relationship between student and course. "marries": The relationship between two persons. |
key |
|
Simple ER Diagram
