Creating a reduced size Test database

Hi everyone,
We currently have some test and development databases which are refreshed regularly as a whole with production data at regular intervals. However the production database is quite big and growing at a considerable rate. This makes demands for disk space on test database servers to grow as well. The test team do not need a full copy of the production so I am investigating the possibility of creating a procedure(perhaps write some scripts) whereby the test database are refreshed with only a certain portion of the production data,keeping all the relationships and constraints in consideration. I will appreciate any input and discussion on how this could be possible and what options can be explored.
Many Thanks,
Mandeep.

Hi ,
Sorry for the late reply. The Test and Dev databases are refreshed with a fresh copy of the production data once or twice a month. The refresh is done by taking an export from the production, doing an import in the Test environment.
Oracle version is 9.2.0.6 on all servers.
Thanks.

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