A primary key of an entity that is used in another entity to identify instances of a relationship.

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What is a data entity called that derives one or more attributes from another entity?
What is a primary key called that is made up of more than one field?
Is an entity whose instances inherit some common attributes from an entity Supertype and then add other attributes that are unique to its instance?
Which entity has a primary key that is partially or totally derived?

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a class of persons, places, objects, events, or concepts about which we need to capture and store data.
)Persons: agency, contractor, customer, department, division, employee, instructor, student, supplier.
)Places: sales region, building, room, branch office, campus.
)Objects: book, machine, part, product, raw material, software license, software package, tool, vehicle model, vehicle.
)Events: application, award, cancellation, class, flight, invoice, order, registration, renewal, requisition, reservation, sale, trip.
)Concepts: account, block of time, bond, course, fund, qualification, stock.

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What is a data entity called that derives one or more attributes from another entity?

Child entity. a data entity that derives one or more attributes from another entity, called the parent. In a one-to-many relationship the child is the entity on the "many" side. Nonidentifying relationship. relationship where each participating entity has its own independent primary key.

What is a primary key called that is made up of more than one field?

Composite Keys: A primary key that made up of more than one attribute is known as a composite key. Below shows an example of a composite key. Each instance of the entity Work can be uniquely identified only by a composite key composed of Employee ID and Project ID.

Is an entity whose instances inherit some common attributes from an entity Supertype and then add other attributes that are unique to its instance?

An entity subtype is an entity whose instances inherit some common attributes from an entity supertype and then add other attributes that are unique to an instance of the subtype.