Charles,

> Having a problem with a query.
> I would like to construct a query which will return a list of all
> contigs which are comprised of clones whose 'read' = 'x' (read can be
> either 'x' or 'y').

It appears that you haven't formulated clearly what you want to get.  I can 
see 3 possibilities:

1. All contigs with one or more clones whose read = 'x' and those clones.
2. All contigs with one or more clones whose read = 'x' and all of those 
contig's clones
3. All contigs where all clones have read = 'x'

Which do you want?  

-- 
-Josh Berkus
 Aglio Database Solutions
 San Francisco


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