Heterogeneous Database System
In a heterogeneous database management system (abbreviated HDBMS ) is an automated (or partially automated ) system for aggregating heterogeneous, diverse databases to provide users with a single standardized interface requests.
This is not a distributed database systems, but the combination of different DBMS.
Problems
Technical differences
Various
- File Formats
- Access protocols
- Query languages
Differences in the data model
It may happen that different DBMS go different ways to store the same data, for example the encoding of column names.
Also, it is very difficult to find a common query system for object-oriented and relational databases.
- Databases