is it possible to store results of aggregate calculations in table fields?

If I can do that and use table field values to do calculations once moved
it won't be necessary for me to use plr.  Earlier I tried:
max_cystalic_pressure int NOT NULL, default max(cystalic_pressure),
and psql won't create the table complaining about default and DEFAULT and
def_EXPR I intended to be max(cystalic_pressure).
Unfortunately Linux command line environment hasn't got anything able to
compete with excel in terms of excel's functions which is why I tried this
database system at all.   I hope I do not have to use Windows to get this
done.


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