EXPORTING AND IMPORTING OF DATA IN OBJECT-RELATIONAL DATABASES

A computer system for transferring data from an object relational database t o another such database. The data in the source database having a table type hierarchy of data tables. The system transforming data from the source database to a flat file format data transf er file using a defined tree traversal order. The columns and subcolumns of the data transfer file corresponding to types and attributes from the source database type hierarchy; The data transfer file having a type identifier column corresponding to a type in the table type hierarchy. The system permitting the inputting of the data from the data transfer file to a target database having a table typ e hierarchy corresponding to the table type hierarchy of the source database.