Structure of distributed databases indbms
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Heterogeneous DDBMS. In a heterogeneous distributed database, different sites may use different schema and software. Difference in schema is a major problem for query processing and transaction processing. ... Heterogeneous systems are usually used when individual sites use their own hardware and software.
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A distributed database (DDB) is a collection of multiple, logically interrelated databases distributed over a computer network. A distributed database management system (D–DBMS) is the software that manages the DDB and provides an access mechanism that makes this distribution transparent to the users.
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