Use MS Visio to create relational data schemas and data dependency diagrams for all entities (tables). Start out with listing all data attributes in 1NF, then label partial dependencies and potential transitive dependencies. For this Data. A database for payment and bookings for a Virginia Beach hotel.  A guest can check into a hotel. A hotel can have many guests. A hotel can keep a record of a guest’s activities. A record can contain many notes. Possible tables might include: Guests, Notes, Room Type, Charges. Possible Primary keys might include: GuestID, NoteID, RoomID, ChargeCode. Possible attributes might include: CustName, Room#, ChargeType.

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Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.