Write a sample JSON document that has a structure consistent with the conceptual schema given above. Your document must contain information about at least one manufacturer, three vehicles, two owners, and two registrations. One of the owners has made two registrations and another one has made one registration. The values for the attributes are up to you but must be sensible.
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- Consider a database schema with a relation Emp whose attributes are as shown below, with types specified for multivalued attributes. Emp = (ename, ChildrenSet multiset(Children), SkillSet multiset(Skills))Children = (name, birthday)Skills = (type, ExamSet setof(Exams))Exams = (year, city) Redesign the database above into first normal form and fourth normal form. List any functional and multivalued dependencies that you assume. Also list all referential-integrity constraints that should be present in the first and fourth normal form schemas.Develop an EER model for the following situation using the traditional EER notation, the Visio notation, or the subtypes inside supertypes notation, as specified by your instructor: An international school of technology has hired you to create a database management system to assist in scheduling classes. After several interviews with the president, you have come up with the following list of entities, attributes, and initial business rules: • Room is identified by Building ID and Room No and also has a Capacity. A room can be either a lab or a classroom. If it is a classroom, it has an additional attribute called Board Type. • Media is identified by MType ID and has attributes of Media Type and Type Description. Note: Here we are tracking type of media (such as a VCR, projector, etc.), not the individual piece of equipment. Tracking of equipment is outside the scope of this project. • Computer is identified by CType ID and has attributes Computer Type, Type Description,…5.14 - Consider the following six relations for an order-processing database application in a company: CUSTOMER (Cust#, Cname, City) ORDER (Order#, Odate, Cust#, Ord_Amt) ORDER_ITEM (Order#, Item#, Qty) ITEM (Item#, Unit_price) SHIPMENT (Order#, Warehouse#, Ship_date) WAREHOUSE (Warehouse#, City) Here, Ord_Amt refers to total dollar amount of an order; Odate is the date the order was placed; Ship_date is the date an order (or part of an order) is shipped from the warehouse. Assume that an order can be shipped from several warehouses. Specify the foreign keys for this schema, stating any assumptions you make. What other constraints can you think of for this database?
- 8.When constructing a database, the designer mustknow what types of relationships exist betweenrecords in different data sets, such as one-to-many or many-to-many. Give three examplesfor each of these relationships.Consider the following business rule:An employee can manage multiple customers. A customer can be managed by multiple employees. How does this business rule(s) affect the database design? a.) The business rules define that there isn't a need for a relationship between the EMPLOYEE and CUSTOMER entities, as the relationship isn't a strong one. b.) The business rules define that there is a relationship between EMPLOYEE and CUSTOMER, and a 1:M relationship between those two entities. c.) The business rules define that there is a relationship between EMPLOYEE and CUSTOMER, and an M:N relationship between those two entities requiring a bridge table. d.) The business rules define that there is a relationship between EMPLOYEE and CUSTOMER, and a 1:1 relationship between those two entities.Consider the following Scenario.Design a database for an airline. The database must keep track of customers andtheir reservations, flights and their status, seat assignments on individual flights,and the schedule and routing of future flights. Your design should include an E-Rdiagram, a set of relational schemas, and a list of constraints, including primary-keyand foreign-key constraints.Please determine the entities, attributes and relationships that should exist in thedatabase and draw an E-R diagram.
- 3- Consider a database for a university system that needs to store information about students,courses, and instructors. Each student can enroll in multiple courses, and each course can havemultiple instructors. Normalize the following schema to Third Normal Form (3NF), and showyour steps in between (1NF, 2NF).Students (StudentID, FirstName, LastName, CourseID, InstructorID)Courses (CourseID, CourseName, InstructorID)Instructors (InstructorID, FirstName, LastName)4- To keep track of office furniture, computers, printers, and other office equipment, the FOUNDITCompany uses the table structure shown below.a. Given that information, write the relational schema and draw the dependency diagram.Make sure that you label the transitive and/or partial dependencies.b. Write the relational schema and create a set of dependency diagrams that meet 3NFrequirements. Rename attributes to meet the naming conventions, and create newentities and attributes as necessary.Draw an EER diagram for AIRLINE relational database. According to model, the following requirements are satisfied:The AIRLINE relational database schema shown in the above figure describes a database for airlineflight information. Each FLIGHT is identified by a Flight_number, and consists of one or moreFLIGHT_LEGs with Leg_numbers 1, 2, 3, and so on. Each FLIGHT_LEG has scheduled arrival anddeparture times, airports, and one or more LEG_INSTANCEs—one for each Date on which the flighttravels. FAREs are kept for each FLIGHT. For each FLIGHT_LEG instance, SEAT_RESERVATIONs are kept,as are the AIRPLANE used on the leg and the actual arrival and departure times and airports. AnAIRPLANE is identified by an Airplane_id and is of a particular AIRPLANE_TYPE. CAN_LAND relatesAIRPLANE_TYPEs to the AIRPORTs at which they can land. An AIRPORT is identified by an Airport_code.1b)By using a scenario, explain program-data dependence issue found in previous database technologies such as file-oriented database before relational database model was introduced.
- Let us consider the following relational database. Students(stuID, lastName, firstName, major, gpa) Faculty(facID, name, deptName, rank) Classes(classNhmber, facID, schedule, room) Enrolls(stuID, classNumber, grade) The primary keys are underlined. The referential integrity constraints are as follows: The column facID of relation Classes that references table Faculty, The column of stuID of relation Enrolls that references table Students, and The column classNumber of relation Enrolls that references table Classes. The following SQL statement is intended to define the table Students. However, this statement does not work correctly. CREAT TABLE Students( lastName VARCHAR(20), firstName VARCHAR(20), major VARCHAR(40) gpa DECIMAL(3,2), PRIMARY KEY(stuID)); However, this statement does not work correctly. Briefly explain why and list the corrected SQL statement.4. (a) Why is normalization important in database design? Consider the universal relation R = {A, B, C, D, E, F, G, H, I, J} and the set of functional dependencies F = { AB → C, A → DE, B → F, F → GH, D → IJ }.What is the key for R? Decompose R into 2NF (Second Normal Form) and then 3NF (Third Normal Form) relations. (b) Consider a relation schema R = (X, Y, Z) on which the following functional dependencies hold: { XY → Z, Z → X }. Show that the schema R is not in BCNF (Boyce-Codd Normal Form) but it is in 3NF (Third Normal Form).‘Problem 2: Data Modeling The recrultment agency TEMPO proposes intemship. employees for enterprises for a period of time. An internship employee is a temporary employee that will be recruited for a period of time. You must develop a database application in order to salisfy these: specifications: - The enterprises (id, name, address and phone number) define the posts for which they nead one or many employees. A post is defined with a label, a daily remuneration, the start date, the end cate and the number of employees for this post. A post needs eventually diploma(s) and a list of many skills. - Anintemship employee s described by a ssn, first name, last name, an address, a phone number, histher diplomas (we store for each diploma the year when it is obtained) and his/her skills. - An empioyee could be recruited for one or many posts. This recruitment of an employee for a given post is validated by a chief (ssn, first name, last name, address) designated by the enterprise. This chief…