Possible heuristic help comes from the realization that many of the combinations do not appear to have much information value. This leads to this work's controlling heuristic focusing on increasing coherence and decreasing dissonance. The heuristic assumption is that reducing cognitive dissonance increases useful information. The speculation is that database exploration can be accomplished through a progressive reduction of cognitive dissonance. A database is a collection of data from which different facts can be efficiently retrieved.
Numerous databases have significant amounts of stored data.
Although simple statistical techniques for data analysis have been developed, advanced intelligent data analysis techniques are not yet mature. As a result, there is a growing gap between data generation and data understanding. At the same time, there is a growing realization and expectation that data, intelligently analyzed and presented, should be a valuable resource. There are several ways to classify database mining work. One way is by the amount of semantic domain knowledge used.