system values and remote databases

Platform: Oracle 8.1.7 on NT or Win2K

select to_char(sysdate,'yyyy/mm/dd hh24:mi:ss')   from dual_at_db_link_to_a_db2_database;

It works, but it is returning the current date/time from the Oracle server, not from the DB2 system. Rather makes sense, but am wondering if anyone knows of a technique to get the date/time from the remote DB instead of the local -- especially when the remote DB is not Oracle.

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Ed Stevens
(Opinions expressed do not necessarily represent those of my employer.)