A. ________ is a description of the database structure. Data independence makes each level immune to changes
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A. ________ is a description of the database structure. Data independence makes each level immune to changes to lower levels.
__________ refers to the Immunity of the external schemes to changes in the conceptual schema. ___________refers to the Immunity of the conceptual schema to changes in the internal schema. Complete the spaces above using one of the keywords:
Relation, Physical data independence, Logical data independence, Integrity constraint, Validity constraint, Database schema.
Related Book For
Managerial accounting
ISBN: b010ikdqzm
10th Edition
Authors: Carl S. Warren, James M. Reeve, Jonathan E. Duchac
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