Group:
distributed database
Topic:
a single system image
Topic:
shared information for collaborative work
Topic:
system integration
Topic:
updating information in a distributed system
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Summary
A heterogeneous database integrates multiple databases. The databases usually have different or conflicting schemas. This simplifies sharing of information and implementing distributed applications.
Heterogeneous databases have had limited success, perhaps because change in one database can destroy the integration with other databases. (cbb 8/06)
Subtopic: integrated database 
| Quote: changes in an integrated database are automatically made everywhere
| | Quote: with an integrated database, new applications can borrow data already collected for other applications [»kentW_1978]
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Subtopic: heterogeneous database
| Quote: Pegasus is a heterogeneous, multidatabase management system developed by Hewlett-Packard; object-oriented and relational [»ahmeR12_1991]
| | Quote: a heterogeneous database may need a common view despite different definitions, algorithms, and units; users can specify the mappings [»ahmeR12_1991]
| | Quote: ADMS+- integrates ADMS+ on a mainframe with a large number of workstation databases called ADMS-
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Subtopic: problems
Quote: using an integrated database for a world-wide, decentralized system would be a management nightmare
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Related Topics
Group: distributed database (6 topics, 194 quotes)
Topic: a single system image (30 items)
Topic: shared information for collaborative work (36 items)
Topic: system integration (5 items)
Topic: updating information in a distributed system
(50 items)
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