Answer the following questions based on the functional dependencies for a relation as provided below: Aircraft(AC_Num, AC_Model, AC_Seats, AC_Rent_Charge, Model_Code, Model_Manufacturer, Model_Seates, Model_RentCharge) Primary key: AC_Num Functional dependencies: AC_Num->AC_Model, AC_Seats, AC_Rent_Charge, Model_Code, Model_Manufacturer, Model_Seates, Model_RentCharge Model_Code-> Model_Manufacturer

Q: re three reasons why the main key of a relation has to be replaced with a surrogate key?

A: Here are three reasons why the main key of a relation has to be replaced with a surrogate key.

Q: what is best way to represent below one to one relationship in the relational model? A)combine…

A: When the relationship between two entities(here Student and Preference) is one to one, then two…

Q: nformally describe the conditions to be met for a relation to be in Third Normal Form. Describe why…

A: 1. For a relation to be in 3NF, all the functional dependencies should be in form X->Y where X is…

Q: This question is based on the following relation and sample data, where Employee Social Security…

A: Actually, database is a used to stored the data.

Q: Consider the following schema for a student relation. {Student ID, Last Name, First Name, Course ID,…

A: Entities:  student, faculty, course and section.  Relationships: student <--m:n--> course…

Q: NORMALIZATION The table above displays snippet of the monthly loan application report send by all…

A: Answer:

Q: An explanation of the three circumstances in which the secondary key of a relation should be used…

A: Indicators that point to the existence of a surrogate key There are three circumstances that point…

Q: In what normal form is the LOTS relation schema in the Figure with respect to the restrictive…

A: The relationship data, if it is in a first NF and all non key depend on primary attribute. Then the…

Q: Describe three situations in which a substitute key for the main key of a relation should be…

A: Given: Indicators that point to the existence of a surrogate keyThere are three circumstances that…

Q: Given the ER diagram below, create relation schemas to capture the database design.

A: Database Management System(DBMS) is a software for storing and retrieving users data while…

Q: PLZ help with the following: Course(course_id,course_name, credit)  Here the course_id,…

A: The correct answer is (b). Attributes, Relation

Q: Consider the following schema for a student relation. Student {Student ID, Last Name, First Name,…

A: Answer: our instruction is answer the first three part from the first part and I have given answered…

Q: PLZ help with the following: Consider the following relations:  Suppliers (Snumber, sname, address)…

A: given relation Suppliers (Snumber, sname, address)        Parts (Pnumber, pname, color)…

Q: Consider the following relations Company and Product. Give the result for the following relational…

A: The meaning of the relational algebra statement in part A is that we have to find product 'PName'…

Q: Show all the steps as you perform normalization for each problem up to 3NF. State your final…

A: From looking at table values since there is transitive dependency as Emp_no determines Lcode and…

Q: Convert the following ERD into relational schema. Sh

A: Relational Schema There are three relational tables: Table Customer represents entity Customer with…

Q: What are three cases when a surrogate key might be used in place of a relation's main key?

A: A surrogate key is an artificially generated or assigned unique identifier that is used to uniquely…

Q: Given the relation below named Student_Registration , answer the following questions. S_id…

A: Relational Schema: A relational schema in a database gives a outline of how data is organized in a…