What are some of the major components in a data mining system?
Assume that the function of the data mining system is to assign scores to various profiles. For example, profiles may be maintained about companies and the scores used to indicate the likelihood that the company will go bankrupt. Alternatively, the profiles may be maintained for customer accounts and the scores indiciate the likelihood that the account is being used fradulently. A typical data mining system processes raw transactional data, consisting of what are called events, to produce the profiles. To continue the examples above, the events may consist of survey data about the companies, or purchases by the customer. First, a data mart is used to store the event and profile data which is used to build the predictive models. For large data sets, the data mart must be designed for efficient statistics on columns rather than simple counting and summaries like a conventional data warehouse, or safe updating of rows, like a conventional database. Second, a data mining system takes data
