select from dynamic table names

I have 16 tables which created according to generated MD5 hash.
At the time of execution i tried to retrieve data from a table where
table name id dynamic.

table name can be expertdb.rate_AVAIL_[0 to F]

I tried to get this from ;
SELECT * FROM expertdb.rate_AVAIL_ ||
upper(substring(md5('2011-11-10')from 1 for 1))

but it is giving an error that is error with '||' appender. please
someone give me an idea..

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*Thanks and Regards,*
Dinesh Kumara,
Software Engineer,
Reservation Gateway Inc,
Email:dinesh(at)rezgateway(dot)com <mailto:dinesh(at)rezgateway(dot)com>
www.rezgateway.com