Find rollno of students who less than 3 cgpa.
Q: What are three indications that a surrogate key should be constructed for the primary key of a…
A: Surrogate key is unique key and also called as synthetic primary key. Surrogate key holds anonymous…
Q: Consider the foreign key constraint from the dept name attribute of instructor to the department…
A: Given: Goal: We have to discuss the cases of foreign key referential integrity constraint violation…
Q: Consider the foreign-key constraint from the dept name attribute of instructor to the department…
A: Violation of foreign key constraint: The foreign key of one table violates when the primary key…
Q: Consider the relations Student(name, Marks) and Teacher(ID, name, Salary) in which name is the…
A: According to natural join, if more than one attribute is in common then natural join selects only…
Q: Consider the following scenario: you have a relation that contains x, y coordinates, and the names…
A: Introduction: Consider the names of the restaurants and the x and y coordinates associated with the…
Q: (7) Consider the following relation for published books: BOOK (Book_title, Author_name, Book_type,…
A: Here key for the given relation is {BookTitle, Author Name} The FD BookTitle -> Publisher,…
Q: List three conditions that suggest a surrogate key should be created for the primary key of a…
A: To be determine: List three conditions that suggest a surrogate key should be created for the…
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 relation for published books: BOOK (Book title, Author_name, Book type, List…
A:
Q: The following functional dependencies describe a relation that is in 2NF. Customer_ID, Store_ID→…
A: Rules of 2NF: Table must be in 1NF No non-prime attribute is dependent on the proper subset of any…
Q: Q1. Create these two relations, then insert the tuples. (Instructor relation: ID is PK, dept_name is…
A: Answer
Q: Convert the following ERD to relation schemas. EXPLAIN your answer. Dept Course number Name Name Id…
A: The Answer is
Q: Normalize the relation Q to 3NF. Q(A, B, C, D, E, F, G) Given the dependency: A -> B,C,D,E,F,G B->…
A: in the following section we will solve the above stated question.
Q: Question 10. Consider the relation R (ABCDE) and functional dependencies set {A highest normal form…
A: Steps to find highest normal form of relation: Find all possible candidate keys of the relation.…
Q: Consider the foreign key constraint from the dept_name attribute of instructor to the department…
A: Violation of foreign key constraint: The foreign key of one table violates when the primary key that…
Q: How can we define relation? Identify the characteristics that make up a relation.
A: The table in the relational database or the relationships created between the same tables using…
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 the meaning of a Functional Dependency between attributes in a single relation A1 → A2. Use…
A: Functional dependency determines relationship between attributes of table dependent on each other.…
Q: Map the car sale ER schema into a relation schema. Specify all primary keys (underline) and foreign…
A:
Q: Consider the following relation: Invoice(Order_ID, Order_Date, Customer_ID,…
A:
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: This relation in which degree of NF? _Explain why?
A: Note: There are multiple questions are given in one question. According to the rule, you will get…
Q: Give an example of a relation with a unique composite key
A: A unique key is one that identifies a row in a relation uniquely. The unique key may be combination…
Q: For a given relationship set, R = {A, B, C, D, E, F} and FD : A->B, C->D, E->F . Calculate F+ of A,…
A: Closure of an Attribute: A set of attributes that can be functionally derived from an attribute is…
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: Consider the relations Student(name, Marks) and Teacher(ID, name, Salary) in which name is the…
A: Natural join joins two table based on common attribute.
Q: 2. Figure 11-34 contains sample data for pet sitters and customers who hire those sitters. In…
A: First Normal Form(1NF) A relation is said to be in 1NF, if there is an attribute or set of attribute…
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: Question 10. Consider the relation R (ABCDE) and functional dependencies set {A → B, B → C, C → D, D…
A: In this question 10, we are given a relation R and set of functional dependencies. We are asked the…
Q: Normalize following relation up to 3NF: Bank(acno, cust_name, ac_type, bal, int_rate, cust_city,…
A: According to the information given:- We have to Normalize following relation up to 3NF.
Q: 1.Write a SELECT query to find all the data of students with name Anum.
A: Select * from Student where Name="Anum"
Q: FK and PK
A: primary key is a column that uniquely identifies a table. Foreign key is a column group of columns…
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: en the candida
A: Solution - In the given question, we have to discuss the differences between the candidate keys and…
Q: Given the following relation vendor order (vendor no, order no, vendor name, qty supplied ,…
A: Composite Key: A composite primary key is the where more than one column in a table is used to…
Q: In a relation R(A,, A2, A3,A4) if A, is candidate key then find the number of possible super keys.
A: Given: A relation having 4 attributes A1, A2, A3,A4. A1 is the candidate key. To Find: Number of…
Q: 4. Consider relation Presidents representing US presidents. Suppose that the following business…
A: Solution: Correct Answer is : Option- (d)
Q: In the figure below, STUDENT relation has a composite primary key contains Stud_ID and Course_ID.…
A: The Answer is in Below Steps
Q: Identify if the following relation is in 1NF: STUDENT(StudentID, FirstName, LastName, (CourseID,…
A:
Q: Given these potential problems, what general conditions influence when to partition a relation…
A: Answer: Issues of vertical partitioning Vertical Partitioning: The separation of the logical…
Q: Consider the following relation with functional dependencies as shown…
A: Given relation is in First normal form
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: 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: A- Determine the primary key and the foreign keys ( if exist ) for each relation : RELATION PRIMARY…
A: As per our guidelines we are supposed to answer only one question. Kindly repost other questions as…
Q: Consider the following relation for published books: BOOK (Book title, Author_name, Book type, List…
A: Let's discuss schema and dependencies: Schema given : Book(Book title , Author_name , Book type…
Q: From the instructor relation of the large university database, find the number of professors in each…
A: Group by statement is used apply grouping of row values in a column. aggregate functions that is…
Suppose there is a relation:
Student(Name, rollno, cgpa, adress, phone)
2. Find rollno of students who less than 3 cgpa.
Step by step
Solved in 2 steps
- Create an unnormalized relation using student and class entities.Write relation algebra for following:Student( Enrno, name, courseId, emailId, cellno)Course(courseId, course_nm, duration)i) Add a column city in student table.ii) Find out list of students who have enrolled in “computer” course.iii) List name of all courses with their duration.iv) List name of all students start with “a”.v) List email Id and cell no of all mechanical engineering students.In the figure below, STUDENT relation has a composite primary key contains Stud_ID and Course_ID. This relation is STUDENT Stud ID Name Course ID Units 101 Lennon MSI 250 3.00 101 Lennon MSI 415 3.00 125 Johnson MSI 331 3.00
- NORMALIZATION EXERCISE Based on the given relation schema below, perform normalization up to 3NF. Write your answer in below space ORDER (Order_ID,Date,Cust_ID,Cust_Name,State,City,ItemNO,ItemDescription,ItemPrice,Quantity) 1NF 2NF 3NFIf you assume that a relation has no duplicate data, how do you know there is always at least one primary key?What is an unnormalized relation? Is it a relation according to the definition of the word relation?
- Relation. QuestionIf there are more than one possible candidate keys, provide some instances of relations that have more than one.Consider the following relation : STUD Class 4 3 4 4 2 Age 19 18 11 10 6 Sname Vikas Shreya Megha Rajan Ritu Let us suppose 'x' is a tuple variable ranging over 'STUD' relation. Following TRC expression is given: vx(~(x.class = 4) Vx.age < 10) What are the number of tuples that are valid according to the above TRC query:
- Discuss the differences between the candidate keys and the primary key of a relation.convert it to relations that are normalizationConsider the foreign key constraint from the dept_name attribute of instructor to the department relation. Give two examples of inserts and deletes to these relations, which can cause a violation of the foreign key constraint.