A database model that describes the attributes of entities and the relationships among them. An entity is a file (table). Today, ER models are often created graphically, and software converts the ...

In a relational database, it is necessary to define the relationship that exists between different entities. A one-to-many relationship exists when one entity can be present in many different ...

A table in a database holds the attributes for ... one-to-many and many-to-many relationships. A one-to-many relationship exists when one entity can be present in many different instances of ...