Which three pieces of information did E.F. Codd describe as necessary to retrieve a data value from a relational database?
Which three pieces of information did E.F. Codd describe as necessary to retrieve a data value from a relational database?
To retrieve a data value from a relational database as described by E.F. Codd, the necessary pieces of information are the attribute (which specifies the type of data), the relation name (which specifies the table), and the primary key (which uniquely identifies the row). These components together allow for precise access to a specific data value within the database.
D. Attribute, relation name, and primary key