Quoting from AUTHOR ryan gaffuri: > 11. Thou shalt feed me if I have to work late to fix something you > broke. > > I'm a single guy... Nuno's design corollary #1: Thou shall not use end_date = NULL to mean "current row" of ANYTHING! NULL has NO MEANING whatsoever: it does NOT mean "current"! Under penalty of having to cook for Nuno (and I'm a heavy bloke)... -- //www.freelists.org/webpage/oracle-l