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ORA-01791: not a SELECTed expression - Order by

sujnanJan 27 2012 — edited Jan 27 2012
Hi,
Below query is executing in one system (database version 10.2 64 bit) without any error.

select distinct CONTRACTOR_ID,CONTRACTOR_NAME from CONTRACTOR order by REGISTRATION_NO

But same query is not working in other system (database version 10.2 32-bit). It throws ORA-01791: not a SELECTed expression error.
Please clarify why it is working in one system and not working in other system

Thanks,
Sujnan
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Locked on Feb 24 2012
Added on Jan 27 2012
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