Calculated Field

Calculated Field - see Computed Attribute. Synonymous with computed attribute, for which the value is calculated from those contained in other fields. Usually, computed fields' values are calculated from other fields' values that occur in the same record, while those that derive their values from across groups of records are more often termed summary fields which, in turn, contain aggregate values (See also: Field, Summary and Field, Aggregate). While calculated fields can be stored in tables, they are often generated when needed.

Source: Northwest Database Services, 06 November 2009 08:55:34, http://www.nwdatabase.com/database-glossary-c.htm