> If you do not know beforehand the units, but need them from 
> the string, then 
> you can do a recursive solution taking one letter at a time, 
> checking if it 
> is a number. If it is not a number, you print out the units.

Another way to remove all characters except digits (and decimal points)
from a string is:

translate($x, translate($x, '0123456789.', ''), '')

Michael Kay


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