Room contains room details for each hotel and (roomNo, hotelNo) forms the prin Booking contains details of bookings and (hotelNo, guestNo, dateFrom) forms th Guest contains guest details and guestNo is the primary key. 1. Identify the foreign keys in this schema. Explain how the entity and refere to these relations. 2. Produce some sample tables for these relations that observe the relational some general constraints that would be appropriate for this schema. 3. Analyze the RDBMS8 that you are currently using. Determine the support primary keys, alternate keys, foreign keys, relational integrity, and views.

Room contains room details for each hotel and (roomNo, hotelNo) forms the prin Booking contains details of bookings and (hotelNo, guestNo, dateFrom) forms th Guest contains guest details and guestNo is the primary key. 1. Identify the foreign keys in this schema. Explain how the entity and refere to these relations. 2. Produce some sample tables for these relations that observe the relational some general constraints that would be appropriate for this schema. 3. Analyze the RDBMS8 that you are currently using. Determine the support primary keys, alternate keys, foreign keys, relational integrity, and views.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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ERD and Keys A hotel has many rooms. A guest can make a reservation for one room or multiple rooms. A reservation is associated with only one guest. Draw an ERD with the relationships and resolve any many to many relationships. Create an ID for each entity you create (for example RoomID, GuestID, Reservation ID) as the Primary Key. Identify any foreign keys in each entity where appropriate.
Convert each one of the diagram into a skeleton relational database schema. Express every relation in the form: R (A, B, C, D, E); Underline a primary key for each relation. Write the attributes of a composite key adjacent to each other – just like A, B in R (A, B, C, D E
a) Transform the given ER-Diagram into a relational schema and, show relationships between the tables and identify the constraints existing between entities. b) Create tables from relations identified in previous step and draw relational schema diagram viewed from mysql interface. name Region Supplier Supplies balan Deals Managee Stock Contains ID D-name) Director Maintains Product name Deals Supervise Employee Handles> Purchase Price (name) Lotha Customer (name Abless Buys
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a) Consider the following EER diagram. Map it to the relational model. Specify the relational schema in DBDL notation. b) Convert the following relational schema to BCNF (FD1, FD2 and FD3 are functional dependencies. CourseOffering(coId, courseId, semesterId, year, campus, courseName) Primary key (coId) Alternate Key (courseId, semesterId, year, campus) FD1: coId courseId, semesterId,
1. All columns in a relation instance must have distinct data values. True False 2. Degree of a relationship set expresses the number of entities to which another entity can be associated via the relationship set, while cardinality of a relationship set refers to the number of entity sets that participate in the relationship set. True False 3. A database has one physical schema, but many conceptual (logical) schemas and external schemas (views). True False
2. a. What characteristics do tables that conform to the concept of well-informed relations have? b. Describe a dependency diagram and explain its purpose c. Normalize the relation given below Order Orde PartN | Part Unit PartQ | Supplie Suppli Suplli Suppl Suppli Supplier rDat umbe Nam Pric uantit rNumb erNam erStre Num ierCit erSateZip e e e er et
20 - Consider the following Entitiy Relationship diagram. Which of the following relation will not hold if the above ER diagram is mapped into a relational model? I) Product (ProductId, Desciption) II) Requests (ProductId, Orderld) III) Order (Orderld, Productid, Date) IV) Order (Orderld, Date) ProductID Description Orderld Date M N Product Requests Order IV b) II c) O I d) O I|
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Explain three cases when a surrogate key should be generated in place of the main key of a relation.
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