An effective database system should satify at least three basic integrity restrictions: unique keys, null restricts, and a special case of inclusion dependancies that allows the design of hierarchies and relationships over class entities. This text addresses these and a variety of other issues.
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An effective database system should satify at least three basic integrity restrictions: unique keys, null restricts, and a special case of inclusion dependancies that allows the design of hierarchies and relationships over class entities. This text addresses these and a variety of other issues.
Read Less