>> I've allways been disturbed by the presentation of 4NF in the "puppies & tricks" poster. It seems to me that there's a misprint, somewhere, or that the key of one of the tables has undergone a shift between the 3NF example and the 4NF example. <<
Marc Rettig is the author. He takes the 3NF example and adds a
"costume" attribute to the "Puppy Tricks" table, but mulitple costumes
can be assigned to each puppy, so you split out a "Puppy Costumes"
table which is all key (puppy_nbr, costume).
Received on Sat Aug 26 2006 - 11:03:04 CDT
