academic purpose or business purpose ?
academic nam 3NF or BCNF walata hariyatama hadanna wei. but commercial project ekak nam project, requirements , possible requirement changes etc. balala thama kochchara normalize karanawada kiyala decide karanne.
samahara parts normalize karanawa, samahara parts normalize karanne ne. may be normalize karapu dewal aye de-normalize karanawa system growth ekath ekka.
ER eka danna balanna