Q1:- 1- Find superkeys, candidate keys, primary keys, alternative keys in the following CAR relation schema? CAR (State, Reg#, SerialNo, Model, Year) 2- Find superkeys, candidate keys, primary keys, alternative keys in the following relation? A1 Hh 101 D10 10 A2 Mm 200 D30 20 АЗ Ff 50 D90 30 A4 LI 60 D53 30 A1 Ff 70 D6 10

Q: Consider the relation schema R (A, B, C, D, E). Find number of super keys if A, CD and BE are the…

A:

Q: What is the maximum number of super keys for the relation R1(P, Q, R, S) with R as the key? (a) 6…

A: Answer: Given R1 has 4 Attribute P,Q,R and S

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: Table_1 below has a primary key of column1. Which column(s) from this relation could be a foreign…

A: When designing a relational database, it is important to determine which columns could act as…

Q: Based on the following functional dependencies, for the relation SCHEDULE bring it into a set of…

A: To bring the relation SCHEDULE into a set of 3NF relations, we need to identify the functional…

Q: Give two examples of a relation and their candidate key

A: Candidate key :                          A candidate key is a set of characteristics that uniquely…

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: Create an unnormalized relation using student and class entities.

A: Here, we have to create an unnormalized relation using student and class entities.

Q: What are three criteria that indicate that a surrogate key for a relation's main key should be…

A: Surrogate key: It is a key that does not have any contextual meaning but is used to identify the…

Q: Given the relation R(A, B, C, D, E, F), the following functional dependencies exist: B --> C, D D…

A: Given : R(A, B, C, D, E, F) B --> C, DD --> F

Q: Consider a relation (p, q, r, s, t, u, v) with functional dependencies as given below: p➜q r➜s,t…

A: Given : A relation (p, q, r, s, t, u, v) with functional dependencies as given below:p ⇒ qr ⇒ s, ts…

Q: A foreign key can refer to only the candidate key of another relation. (a) True (b)False

A: The primary key of one table is referred to by another table's foreign key, which is an attribute of…

Q: under what three circumstances does it become necessary to generate a surrogate key in place of the…

A: This question comes from Database Management System which is a paper of Computer Science. Let's…

Q: List all nontrivial functional dependencies satisfied by the relation of Figure7.18.

A: Given: List all nontrivial functional dependencies satisfied by the relation of Figure7.18.

Q: Consider the following relation: r (A1, A2, A3). For all the states of the relation, the result of…

A: Query : database query is a request for data from a database. Primary key :  Primary key constraint…

Q: 3. Identify the Super key, Candidate key, Primary key, Foreign Key in the below relation.…

A: The solutions are

Q: Below are three situations where a surrogate key could replace the relation's primary key.

A: - We need to talk about three situations where a surrogate key can replace a relations primary key.

Q: What is an unnormalized relation? Is it a relation according to the definition of the word relation?

A: In a database management system, a relation is a collection of interconnected tables or a single…

Q: Consider the following relation with functional dependencies as shown below. R{sno, sname, age, cno,…

A: Given:

Q: 2. For the following questions, please identify the candidate keys of the given relations. You need…

A: - We need to find the keys from the relations provided.   - Candidate keys are those minimal keys…

Q: en the candida

A: Solution - In the given question, we have to discuss the differences between the candidate keys and…

Q: Please help with the folllowing: Consider the following declaration of a relation schema…

A: QI:  Insert INTO R (B, C) Values (353, 'B');  Screenshot of SQL program for the above insertion…

Q: Choose all of the correct superkeys.) Find all superkeys of the DEPARTMENT relation. Its primary key…

A: Super key means a set of one or more attributes which uniquely represents a tuple. Given primary key…

Q: What three situations make it necessary to make a substitute key instead of the main key of a…

A: In relational databases, a key is a unique identifier that helps establish relationships between…

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: Here are three examples of when it makes sense to create a surrogate key in place of the primary key…

A: requirements for suggesting a substitute key There are three circumstances that indicate a…

Q: Authorname, Book_type, Listprice, Author_affil, Publisher) Author_affil refers to the affiliation of…

A: (a) Explanation: =>Let say relation BOOK =R, Book_title = A, Author_name = B, Book_type = C,…

Q: Write a relation algebra based on the following algebra: Book (BookID, Price, Year, Author,…

A: Relation algebra uses operators to perform the query. It provides the theoretical foundation for…

Q: Primary key identifies a unique tuple of a relation, true or false?

A: Primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a…

Q: List all nontrivial functional dependencies satisfied by the relation of Figure 7.18.

A: NON-TRIVIAL FUNCTIONAL DEPENDENCIES: Functional dependency refers the concept in which one…

Q: Write a relation algebra based on the following algebra: Book (BookID, Price, Year, Author,…

A: relational algebra for the above relations is in step2 .

Q: What is the link between a relation's main key and the functional dependencies among all of its…

A: Functional Dependency -(FD) is a constraint in a Database Management System that establishes the…

Q: Normalize the following given data to 1/2/3 NF. State the relations schema after every…

A: The key for the given relation is (SID, CID)  The FD's possible are SID->s_name,  CID->C-name,…