Final answer:
An entity refers to a real-world object that an individual table in a database represents with rows (records) and attributes (fields).
Step-by-step explanation:
Relational databases store data over several tables. Each table contains data about just one entity, which is what you build the database with. All tables require a primary key. You can also link tables in a relational database using primary keys and foreign keys. In a database, the term entity refers to a real-world object or concept that can be distinctly identified. An entity is like a blueprint for tables, which are structures that hold data about these real-world elements in a systematic manner. A table in a database is made up of rows and attributes.
A row, also known as a record, represents a single, implicitly structured data item in a table. Each row in a table represents a unique instance of the entity type that the table describes. On the other hand, an attribute, also known as a field or column, is a property of an entity and represents a data point within each row of a table. For example, if we have an entity representing a 'Student,' the related table might include rows where each row represents one student, and the attributes could be 'Student ID,' 'Name,' 'Age,' etc.