Database Management Systems

This aspect of distributed processing system states that the data is tied to some property.

This condition in data fragmentation is the one in which it is always possible to reconstruct a global relation from its fragments.

This access to distributed database is the one in which application issues a request, which is automatically routed by the DDBMS to the site where the data is located.

This storage structure in Oracle contains all the database data that the users of the database save and retrieve using SELECT and other DML statements.

Data warehouse is a collection of corporate information derived from the operational systems and some external data sources.

This criteria for data warehouse requires incemental loading of new data on a periodic basis within narrow time window.

This category of data warehouse contains a place for storing data, that are 5 to 10 years old, to be used for comparisons, trends and forecasting.

Data mart is a workgroup or departmental warehouse, which is small in size.

This data is typically stored in a format that makes analysis much easier.

In this category, data are not updated or changed in any way once they enter the data warehouse, but are only loaded and accessed.

The performance of the database server must be good enough to support the user's performance expectations during analysis.

The scalability of the server must be such that your choice of server can handle the requirements of an ever-growing amount of data in the data warehouse.

 He must know how to phrase questions for determining the end users' needs.

In this criteria, many steps are taken to load new or updated data into the data warehouse including data conversion, filtering, reformatting, integrity checks, physical storage, indexing and metadata updates.

This style of driver requires that some binary code be loaded on each client machine.