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Saturday, 14 March 2015

Date's Twelve Rules for Distributed Database Systems

Date's Twelve Rules for Distributed Database Systems / Twelve Objectives for Distributed Database System

Like Edgar F Codd’s twelve rules for a DBMS, C J Date defined a set of twelve objectives to be satisfied by a fully Distributed Database System (DDBS). These twelve rules forms a basis for understanding distributed database technology. These can be considered as a framework for characterizing the functionality of specific distributed systems.
Note: it is hard to attain all the twelve rules for any distributed database systems. Currently no Distributed Database Management Systems conforms to all the twelve rules.

Figure - 12 Rules for DDBMS [taken from Internet]

Date's Twelve  Rules

7. Distributed query processing

8. Distributed transaction management

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