This is the database specific data type. It must be a valid data type for the data warehouse database platform. Typical data types for DB2 are integer, numeric, char(), varchar() and date. Typical data types for Oracle are integer, number, char(), varchar2() and date. For SQL Server common types are integer, numeric, varchar() and datetime. See the database documentation for a description of the data types available. Changing this field alters the table's definition.