Our “Bull’s-Eye” graphical report presents the highest-level summary of our analysis, evaluation, and comparison of the data type support in the four leading data warehouse databases: IBM DB2 Version 8.1 Data Warehouse Enterprise Edition, Oracle9i Enterprise Edition, Sybase IQ 12.5, and Teradata Warehouse 7.0. By data type support, we mean that a data warehouse database provides the mechanisms to define, implement, access, manipulate, and manage a given type of data.