Column in select change changes results

I am seeing quite strange behavior in one of my databases.
I am running a fairly large query. when i put one particular column in the select it returns no data. select * returns the correct rows (with this column populated) as does selecting other fields. if i specify this field directly with any other fields then no rows return. is this possible seeing as the field in question is not in the where or join clauses)
I have imported the stats and data into other database and all works correctly, I have compared the databases, no differences except the problem machine is 64bit.
any ideas?
Edited by: the_gusman on Sep 14, 2009 3:54 PM

if there were, removing columns from the select list or selecting * would return no rows also, but this is not the case.It's not about the SELECT-list imo, but your WHERE-clause, your predicates.
It would be interesting to see your output anyway.
Please post it between the tags...
See :http://forums.oracle.com/forums/help.jspa regarding using tags, scroll down a bit.

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