SQLisfullofdifficultiesandtrapsfortheunwary.Youcanavoidthemifyouunderstandrelationaltheory,butonlyifyouknowhowtoputthattheoryintopractice.Inthisbook,ChrisDateexplainsrelationaltheoryindepth,anddemonstratesthroughnumerousexamplesandexerciseshowyoucanapplyittoyouruseofSQL.This