A database is in 3rd NF if A. It is 2ndNF and in 1stNF B. It is in 2ndNF and all non-key fields depend on all key fields C. It is in 2nd NF and all non-key fields depend only on one key field D. It is in 2ndNF and all non-key fields may depend indirectly on all key fields Justify your answer with explanations

A database is in 3rd NF if A. It is 2ndNF and in 1stNF B. It is in 2ndNF and all non-key fields depend on all key fields C. It is in 2nd NF and all non-key fields depend only on one key field D. It is in 2ndNF and all non-key fields may depend indirectly on all key fields Justify your answer with explanations

Database Systems: Design, Implementation, & Management

11th Edition

ISBN:9781285196145

Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Chapter10: Transaction Management And Concurrency Control

Section: Chapter Questions

Problem 1P

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Today almost every commercial database is based on O the hierarchical model O the linked-list model O the object-oriented model lists the relational model Given the relations: STUDENT (SID. StudentName, Major, AdvisorID) ADVISOR (AdvisorID, AdvisorName, Office, Phone) such that each student is assigned to one advisor, which of the following is true? O Major is a candidate key. O Phone is a candidate key. AdvisorName is a determinant. O AdvisorID is a foreign key. O SID is both a primary key and a foreign key.
I need help with the following Consider a STUDENT relation in a UNIVERSITY database with the followingattributes (Name, Ssn, Local_phone, Address, Cell_phone, Age, Gpa). Note thatthe cell phone may be from a different city and state (or province) from thelocal phone. A possible tuple of the relation is shown below:Name Ssn Local_phone Address Cell_phone Age GpaGeorge Shaw 123-45-6789 555-1234 123 Main St., 555-4321 19 3.75William Edwards Anytown, CA 94539a. Identify the critical missing information from the Local_phone andCell_phone attributes. (Hint: How do you call someone who lives in a dif ferent state or province?)b. Would you store this additional information in the Local_phone andCell_phone attributes or add new attributes to the schema for STUDENT?c. Consider the Name attribute. What are the advantages and disadvantagesof splitting this field from one attribute into three attributes (first name,middle name, and last name)?d. What general guideline would you recommend for…
Take a database, having FDs as: DOB->Age; Age->Eligibility; Name->RollNo; RollNo->Name; CourseNo->CourseName; CourseNo->Teacher; (RollNo, CourseName)->Marks. The relation (RollNo, Name, DOB, Age) is in which Normal Form?
Consider a database with tables with parent tables and tables without parent tables. What differentiates controllers used to manage data for tables with and without parent tables?a) The routing algorithm to the controllerb) The number of methods in the controllerc) The controller method parameters, redirections, and model manipulationsd) Views are called from the models instead.
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.
Suppose we have a relational database with five tables. table key Attributes S(sid, A) Sid T(tid, B) Tid U(uid, C) Uid R(sid, tid, D) sid, tid Q(tid, uid, E) tid, uid Here R implements a many-to-many relationship between the entities implemented with tables S and T, and Q implements a many-to-many relationship between the entities implemented with tables T and U. A. Write an SQL query that returns all records of the form sid, uid where sid is the key of an S- record and uid is the key of a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. B. Write an SQL query that returns records of the form A, C where the A-value is from an S- record and the C-value is from a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. C. Could one of your queries from parts (a) and (b) return more records than the other? If so, which one? Justify your answer. D.…
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Passenger (pid, pbithday, pcity)Station (sid, sname, sxcoord, sycoord)CheckIn (pid, departure_sid, arrive_sid, departure_date, arrive_date)departure_sid reference sid in Stationarrive_sid reference sid in Stationpid references pid in Passenger there are 400 million Passenger, 500 stations, and 20 billion checkIn stored in the schema. For simplicity, assume that every attribute is of size 8 bytes, and the size of each tuple is thus 8*x bytes for a table with x attributes, and that the size of a table is simply the size of a tuple multiplied by the number of tuples (i.e., 100% occupancy and no gaps or space for block metadata). Now consider the following queries: SELECT P.pidFROM Passenger p, CheckIn C, Station SWHERE P.pid = C.pidand C.departure_sid = S.sidand S.sname = "LA"and year(P.pbithday) = 2000and date(C.departure_date) = "2015-12-12" question:1. first join P with C, and then join result with S2. first join S with C, and then join result with PWhich way would be faster for this…
Draw the relationships and entities model for each of the following: * in the traditional way* for example: see the pic??. In the database of the library, the author can author more than one book, and the book can be subscribed toWritten by more than one author
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By given the following models and database context classes, answer the following questions or complete the missing codes: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.ComponentModel.DataAnnotations.Schema; using System.ComponentModel.DataAnnotations; namespace UniversityAssociationMvc.Models { public class Student { public int StudentID { get; set; } public string LastName { get; set; } public string FirstName { get; set; } public string Phone { get; set; } public string Email { get; set; } public DateTime RegistrationDate { get; set; } public virtual ICollection<Membership> Memberships { get; set; } } } using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.ComponentModel.DataAnnotations; namespace UniversityAssociationMvc.Models { public class Club { public int ClubID { get; set;…

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