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Database Design 2nd Edition pp70 3NF: Client_Interview: ClientNo InterviewDate InterviewTime StaffNo RoomNo CR76 13-May-02 10:30 SG5 G101 CR56 13-May-02 12:00 SG5 G101 CR74 13-May-02 12:00 SG3 G102 CR56 1-July-02 10:30 SG5 G102 BCNF: Client_Interview2: ClientNo InterviewDate InterViewTime StaffNo CR76 13-May-02 10.30 SG5 CR56 13-May-02 12.00 SG5 CR74 13-May-02 12.00 SG37 CR56 1-July-02 10.30 SG5 StaffRoom: StaffNo InterviewDate RoomNo SG5 13-May-02 G101 SG37 13-May-02 G102 SG5 1-July-02 G102 Ensure that no client can have a meeting at the same date/time. Ensure that no room can have a meeting at the same date/time. Ensure that no staff can have a meeting at the same date/time. Ensure that a meeting must have a client, a room, and staff. 4NF: client (ClientNo*) room (RoomNo*) staff (StaffNo*) client_meeting (ClientNo*@, InterviewDate*, InterviewTime*) room_meeting (RoomNo*@, InterviewDate*, InterviewTime*) staff_meeting (StaffNo*@, InterviewDate*, InterviewTime*) Ensure that a meeting must have a client, a room, and staff. This cannot be ensured by the database, only through program logic.