b. Transform the following Entity relationship diagram into the Relational Schema HireDate (MnName) (ManID GSM COMPANY Manages MNAGER ComName Education Addess ComPhone
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- Given the following relation(s) and the functional dependencies, what is the highest normal form the data model complies to? Note: Primary keys are indicated in bold. TaxiRide (jobID, jobDateTime, driverID, driverName, taxiID, clientID, clientName, jobPickUpAddress)jobID -> jobDateTime, driverID, driverName, taxiID, clientID, clientName, jobPickUpAddressjobDateTime, driverID -> jobID, driverName, taxiID, clientID, clientName, jobPickUpAddressjobDateTime, taxiID -> jobID, driverID, driverName, clientID, clientName, jobPickUpAddressjobDateTime, clientID -> jobID, driverID, driverName, taxiID, clientName, jobPickUpAddressdriverID -> driverName, taxiIDclientID -> clientName A)1NF B)2NF C)3NFThe following is a relational schema for a database to document sharksightings for a research project. Primary keys are underlined. ForeignKeys are identified by FK, and their name indicates the attribute that theyreference.________________________________________________________________Sharks(shark_id:Integer, name:String, species_name:String,tagged_by_mission_id:Integer (FK))Sightings(shark_id:Integer (FK), sighting_num:Integer,sight_time:Timestamp, lat:Real, lng:Real, ocean:String, mission_id:Integer(FK))Missions(mission_id:Integer, start_date:Date, end_date:Date,vessel_id:Integer (FK))ResearchVessels(vessel_id:Integer, name:String)________________________________________________________________Sharks identified by a unique id, have a name which is not necessarilyunique, and a scientific species name.All Sharks are tagged and are sighted by Research Vessels, which areresearch ships that go on research Missions throughout the year. EachMission has a start and end date. Shark…Consider a relational database for an online hotel booking company. The database consisting ofthe following tables (where the primary keys are underlined): Hotel (hId, hName, hAddress, hCity) Guest(gId, gName, gAddress, gCity) Room(hid, roomNo, type, price) Booking(gId, hId, roomNo, fromDate, year, noOfDays)Where hId and gId are identifiers for the hotels and the guests,and the Booking relation indicated that a guest booked a hotel room for a specified number of days(noOfDays) starting from fromDate of a given year. For instance, a tuple < g12345, h5555, 220,Jan05, 2016, 15> in Booking indicates that the guest g12345 booked room 220 of the h5555 hotelfor 8 days starting on Jan 5, 2016. The attribute "gAddress" records the home address of theguests.Write the following queries in relational algebra (1) Return thename of guests who have booked a hotel room in NYC in January 2016 (i.e.,fromDate between 01/01 and 01/31 and year=2016).(2) Return thename of guests who have booked a…
- Consider the database schema below for cities in countries. A country have many cities, and the same city name can be found in different countries. Country (ID: integer, Name: String (unique)) City (serialNo: integer (unique, not null), CountryID: Integer, CityName: String, Population: integer) A city can have unknown CityName? No, violates domain constraints. Yes. No, violates entity Integrity constraint No, violates key constraint. No, violates referential integrity constraint.QUESTION 4 Consider the database schema below: Company (CompnayID: integer, CompnayName: String (unique), address) Department (DepartmentID: Integer, DepartmentName: String, CompanyID: Integer) Employee (ID:integer; name:String, DepartmentID:intger (not null)) Is it valid in the department relation, that two different departments to have the same value of CompanyID? No, violates domain constraints. No, violates key constraint. Yes. No, violates referential integrity constraint. No, violates entity Integrity constraint.Let us consider the following relational database. Students(stuID, lastName, firstName, major, gpa) Faculty(facID, name, deptName, rank) Classes(classNumber, facID, schedule, room) Enrolls(stuID, classNumber, grade) The column facID of relation Classes that references the table Faculty, The column StuID of relation Enrolls that references table Students, and The column classNunber of relation Enrolls that references table Classes. The following SQL statement is intended to add a record to the table Students. Assume that the entered value for each column is appropriate. In other words, there is no domain constraint violation. INSERT INTO Students(stuID, lastName, firstName, major) VALUES('950555111', 'Anna' 'Smith', 'BSIT'); However, this statement does not work correctly. Briefly explain why and list the correct SQL statement.
- Provide a normalized relational logical schema for the same database (N.B. It is not mandatory to report the restructured E-R diagram) Define referential integrity constraints for 2 relationships of your choice among those defined in the conceptual schema solution: CUSTOMER(FiscalCode, Name, Surname, Address, LoyaltyCard*, Type) INTOLERANCES(Intolerances, FiscalCode) TICKET(CodS, CodF, Date, FisclaCode, Price) SEAT(CodS, CodF, Class) FLIGHT(CodF, Departure, Arrival, Departure_date, Arrival_date, Airplane_type) Integrity constraints: SEAT(CodF) REFERENCES FLIGHT(CodF) TICKET(CodS, CodF) REFERENCES SEAT(CodS, CodF) TICKET(FiscalCode) REFERENCES CUSTOMER(FiscalCode) i provided the solution but i dont understand where it came from. when do we and when do we not consider the black circles in the diagram and if we do for what and on what basis do we consider them? what is type? what are the references and how do i understand which ones i should take and not? please explain every…Defineanomaly? Exists a database where the three anomalies were discovered? Give a response to any anomalies that could be caused by resolving the issues?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.
- QUESTION 15 Consider the database schema below for hotels in countries. A country have many hotels, and the same hotel chain (name) are available in different countries. Country (ID: integer, Name: String (unique)) Hotel (CountryID: Integer, HotelName: String, ManagerID: Integer) A hotel can have unknown manager? No, violates key constraint. Yes. No, violates domain constraints. No, violates entity Integrity constraint No, violates referential integrity constraint.There is a central fact table and 4 dimensions – Time, A, B and C. The ratio m: n between 2 attributes of the hierarchy represents that for every ‘m’ occurrence of a parent element there will be a maximum of ‘n’ children. As per the current state, this fact table contains1. 3 Years2. 4 A1s3. 5 B1s4. 5 C1s Q1: What is the maximum possible fact data volume in terms of record/row count? Answer: Q2: The m:n ratio from attribute B3 to attribute B4 is changed from 1:3 to 1:1 due to some organizational changes. By how many times the maximum possible fact data volume (by record count) decreases? Answer:Consider a database that consists of the following relations.SUPpLIER(Sno. Sname)PART(Pno, Pname)PROJECT(Jno, Jname)SUPPLY(Sno, Pno, Jno)The database records information about suppliers, parts, and projectsandincludes a ternary relationship between suppliers, parts, and projects.Thisrelationship is a many-many-many relationships. Specify and execute thefollowingqueries using the relational algebraRetrieve the part numbers that are supplied to exactly two projects.b. Retrieve the names of suppliers who supply more than two parts toproject J11c. Retrieve the part numbers that are supplied by every supplier.d. Retrieve the project names that are supplied by supplier S1' only.e. Retrieve the names of suppliers who supply at least two different partseach to at least two different projects.
