Which data element stores a single piece of data about a person, place, thing, transaction, or event?

Question

BlackTom AI · Accepted Answer

In data modeling terms, the question is asking which data element holds a single piece of information about a person, place, thing, transaction, or event.
Option 1: Attributes. This is the correct concept: an attribute is a single data element or characteristic that describes an entity, such as a person's last name, a transaction date, or a product price. It represents one piece of data about the item being described.
Option 2: Entity. An entity represents a thing about which we store data (e.g., a person or a product) and is a collection that can have many attributes; it is not itself a single data element but a category or object in the model.
Option 3: Key. A key is a special attribute (or set of attributes) used to uniquely identify an instance of an entity. It is not the single data element describing the item, but rather a unique identifier.
Option 4: Records. A record is a row in a table that aggregates multiple attributes together for a single instance. It contains multiple pieces of data, not just one, so it is not the single data element described in the prompt.

Which data element stores a single piece of data about a person, place, thing, transaction, or event?

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