【简答题】Consider the relation Courses(C,T,H,R,S,G), whose attributes may bew thought of informally as course, teacher, hour, room, student, and grade. Let the set of FD's for Courses be C → T, HR → C, HT → R,...
【简答题】One day a student went to see his teacher. He had been given an important position and now was coming to say goodbye to his teacher. The old man asked him how he would live among high officials. The s...