Suppose you have a relation containing the x, y coordinates and names ofrestaurants. Suppose also that the only queries that will be asked are of the following form: The query specifies a point and asks if there is a restaurant exactly at that point. Which type of index would be preferable, R-tree or B-tree? Why?

Q: Consider the following relation: Customer (CID, name, email, address) Now write Mysql query to…

A: CREATE TRIGGER trg_EMAIL ON EMAIL_CHANGE AFTER INSERT, UPDATE AS IF ( UPDATE (cid, oldemail,…

Q: Given a relation S(student, subject, marks), write a query to find the top 10 students by total…

A: Given:   Given a relation S(student, subject, marks), write a query to find the top 10 students…

Q: products * productCode productlines orderdetails * productLine textDescription htmlDescription image…

A: Since you have not provided the data present in the table, I am providing the query based on certain…

Q: Create ERD or EERD of local school library with these requirements, and write relation schema…

A: answer is

Q: The following INSTRUCTOR relation shows the information of instructors and the training sessions…

A: The key for the given relation is : (InstructorID, SessionID) The functional dependency we have are:…

Q: How did you normalize the following relation? When the PK is (Room#, Reservation#). Name Phone email…

A: Introduction: Normalization is the most popular method of rearranging data in a data collection so…

Q: Suppose you have a relation containing the x. y coordinates and names of restaurants. Suppose also…

A: The answer is given in the below steps.

Q: If a parallel data-store is used to store two relations r and s and we need to join r and s, it may…

A: Performing a join:   Consider a cloud data storage is used to store the given two relations.…

Q: Write relation algebra for following: Student( Enrno, name, courseId, emailId, cellno)…

A:

Q: Under what circumstances can a relation have duplicate rows?

A: GIVEN: Under what circumstances can a relation have duplicate rows?

Q: We have the following relation: Subscriptions(ID, startingdate, length, customerID, customerName,…

A:

Q: Find the result relation of the above query

A: The Relational is query is a very interesting one. Let's understand step by step. The Infinite…

Q: Qno 2: Normalize the following Customer-Order Relation up to 3rd Normal Form, but step by step show…

A:

Q: Could you tell a step by step procedure of finding a super key for A relation R(A,B,C,D, E) having…

A: Solution - In the given question, we have to find the super key of the given relation R(A,B,C,D,E).…

Q: Consider the relation EMPLOYEE(Eid, Name, Did, Salary, Age, Phone). Create indexes to support the…

A: Index: Index is used to retrieve the data from database more quickly. User cannot see the index. It…

Q: Let R(A, B, C, D) be a relation with FD's: A → B, C → D, AD → C, and BC → A. If we decompose R into…

A: Answer to the above question is in step2.

Q: How did you normalize the following relation? When the PK is (Room#, Reservation#). Name Phone email…

A: Normalization is the most common way of rearranging information in a data set with the goal that it…

Q: Suppose there is a relation: Student(Name, rollno, cgpa, adress, phone) 1.Write a SELECT query to…

A: 1. Select * from Student where Name="Anum";  2. Select Rollno from Student where cgpa<3 ; GroupBy…

Q: i) Add a column city in student table. ii) Find out list of students who have enrolled in “computer”…

A: As per our company guidelines, we are supposed to answer only three subparts of post and kindly…

Q: rence relation is defined as 1

A: Given:Solved using divide and conquer approach    nr=n-1r-1+n-1r Function  Xn,r  if  (r=0  or n=r)…

Q: What factors could result in skew when a relation is partitioned on one of its attributes by: a.…

A: Factors resulting in skew A skew generally occurs during partitioning. It occurs if the…

Q: Suppose that we have a relation marks(ID, score) and we wish to assign grades to students based on…

A: SELECT query can be used to find the number of students with each grade. SQL WITH clause can be used…

Q: Suppose you want to compute r ⟕r.A=s.A s.a. Suppose s is a small relation, while r is stored…

A: a) Efficient parallel algorithm to compute the left outer join: It is given the relation s is…

Q: Suppose a relation contains partial dependencies. At most, what normal form would it be? Select one:…

A: The correct answer is

Q: 1.Write a SELECT query to find all the data of students with name Anum.

A: Select * from Student where  Name="Anum"

Q: It may be advantageous to keep the join as a materialized view if a parallel data-store is used to…

A: materialized a view is a database object that contains the results of a query. For example, it may…

Q: What is the minimum total number of tuples across all relations that can be entered in the database…

A: Answer One Library book has at least 2 copies. one Library book can be written by one or many…

Q: QUESTION 6 Consider the following functional dependencies for a relation R(A, B, C, D) A -> (B, C,…

A: A super key whose any proper subset is not super key is called candidate key.   closure table : (A)+…

Q: ____________________ produces a set of sequences in which every tuple in one relation is paired with…

A: Its cross join. Explaination: the Cartesian Product of sets A and B is defined as the set of all…

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: ?Which type of relation is an excellent candidate for improvement to second normal form relation…

A: The suitable answer is (a) Relation with an AutoNumber primary key field.

Q: I am getting an error about an existing constraint with the borrower_fkey for the borrower relation.…

A: Below is the answer with explanation:

Q: Derive the optimized tree for the below query using heuristic approach SELECT Dname, COUNT (*) FROM…

A:

Q: It may be advantageous to keep the join as a materialized view if a parallel data-store is used to…

A: Introduction:   Consider storing the given two relations in a cloud data storage system.…

Q: NORMALIZATION EXERCISE   Based on the given relation schema below, perform normalization up to…

A: First Normal form conditions:-  Table cell contains single value. Each complete row must be unique.…

Q: Modify the recursive query in Figure 5.16 to define a relationprereq_depth(course_id, prereq_id,…

A: The given recursive query has to be modified so that the depth attribute denotes the level of…

Q: Assume a user creates a new relation r1 with a foreign key that links to another relation r2. What…

A: Introduction: A FOREIGN KEY is like a field (or set of fields) in one database that refers to the…

Q: If you assume that a relation has no duplicate data, how do you know there is always at least one…

A: We can always be sure that there is always at least one primary key. Consider the situation when…

Q: In a restaurant, customers usually may buy any number of meals at any time. Several customers can a…

A: ER DIAGRAM:   In this, the entities are Customer and Meal. buy is the relationship type between the…

Q: Consider the library database of Figure 3.20. Write the following queries in SQL.Find the average…

A: Explanation: The below query is used to print the average number of books borrowed by the…

Q: Suppose that we have a relation marks(ID, score) and we wish to assign grades to students based on…

A: Below is the SQL query to create a table “marks” and insert some values in the table: - Query: -…

Q: Suppose relation R(A, B) has 2 tuples and S(C, D, E) has 3 tuples. What can we say about the…

A: Suppose relation R(A, B) has 2 tuples and S(C, D, E) has 3 tuples. What can we say about the…

Q: Find rollno of students who less than 3 cgpa.

A: 2. Select rollno from Students where cgpa<3 ;

Q: Let T(a,b,c) be a relation in which attribute a is not NULL. Consider the SQL query: SELECT * FROM T…

A: We are given a relational query and we are going to find its equivalent sql query. Note: Not In…

Q: The following PEOPLE relation keeps information about people such as their social security number,…

A: Answer to the above question is in step2.

Q: 1.Write a SELECT query to find all the data of students with name Anum. 2. Find rollno of students…

A: FOR GIVEN RELATION -  Student(Name, rollno, cgpa, adress, phone) Suppose a table structure like…

Q: write the FD and 1NF, 2NF, 3NF ( normalization form ) for the follwing relations   _______________…

A: The solution is as follows