Abstract: An integrated data mining and relational database management system is provided on a server. The data mining engine determines characteristics of relationships between input data values and an output data value that are obtained from a relational database (managed by the relational database management system). The integration allows direct conversion of data values from the relational database to data mining identifiers used for data mining operations by the data mining engine, and vice-versa. The integrated server also makes patterns uncovered during data mining (e.g., “understand” and “predict” information) available in virtual relational database tables that can be queried.

Abstract: Hybrid target indexes are employed for skewed data set domains. Such hybrid indexes contain multiple value representations within a given index. The representations can be optimized for particular keys in highly skewed data set domains. For example, a hybrid target index on customer states might employ a bitmap to represent the index value for a California key and also employ, in the same index, an uncompressed list of row-IDs to represent the index value for a Delaware key.