Your response is not helpful, you need to focus on the OP requirements
It is YOUR response that is NOT HELPFUL and is out of line. You owe user481739 an apology.
It is up to OP to decide if a response is helpful or not, not yours or any other responders. We want to encourage more people to participate on the forums and responses like yours discourage newcomers from taking an active part in making the forums a useful place to get and provide information about Oracle technology and products.Agree with the sentiment, but I always have a problem with those asking the question being the sole evaluation of its value. Others can and should pass judgement too, though certainly with more finesse (as if that will ever happen :p ).
You can't possibly know what 'minimal downtime' would be acceptable to OP or what possible solutions might be most appropriate for OP's tables or use case.Agreed.
OP didn't even provide any information about how many tables need to be migrated, how large they are, what downtime might be acceptable, what the time-frame is for migrating all tables to the new tablespace or other important information.
user 481739 offered three perfectedly valid possible solutions to OPs problemNot enough detail. See http://www.oracle.com/technetwork/issue-archive/2005/05-sep/o55security-100471.html for export considerations, for example.