Consider the following relational schema: Student (sid, sname, dept) Enroll (cid, sid, grade, semester) Course (cid, cname, dept, credit) Prereq (cid, pid) Write the following queries in Relational Algebra expression: a) For students who have received an A in a course, return name of students and title of the course. b) Find name and id of students taken at least one of the prerequisite of CS595 course and got an A grade in this prerequisite course.

Q: Please written by computer source The following relation is an extract from a restaurant…

A: Introduction : This question involves analyzing a relation from a restaurant point-of-sale (POS)…

Q: PLZ help with the following: Using Oracle SQL developper Translate your ER diagram into a…

A: E-R Diagram is given with different attributes and relationships between them.

Q: Consider the following sales relational database schema for sales. tem (ItemNo: integer, itemName…

A: Below is the answer of the above query. I hope this will be helpful for you...

Q: Study the relational schema: CUST(ID, Name, ProdID) PROD(ProdID, PName, Price) Which of the…

A: option(B) is the correct option.

Q: Using this unnormalized table and the five functional dependencies and third normal forms. In other…

A: To find the normal forms for the given functional dependencies, we need to check each normal form…

Q: What constraint is imposed on am attribute that is declared as Primary Key? What bemefit does that…

A: The solution to the given problem is below.

Q: 4. In a company, employees involved in many projects, and each project may have many employees…

A: Please refer below for your reference:

Q: write one relational algebra statement to show the cities and the number counts of staffs in each…

A: Relational algebra statement: RELATIONAL pure mathematics could be a wide used procedural command…

Q: Q3) consider you have the airport database with the following relations, where the primay keys are…

A: The question is a multipart type question. Hence only first three has been answered according to the…

Q: What is the binary relationship?

A: Binary relationship A Binary Relationship is a relationship between two different Entities which…

Q: A relation may not have a super key. (a)True (b)False

A: A super key is a set of one or more attributes (columns) within a relational database table…

Q: What conditions allow a relation's attribute to have a changeable length?

A: According to the question, we have to answer that what conditions allow a relation's attribute to…

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

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

Q: Consider the relational schemas given below and the respective sets of functional dependencies valid…

A: Summary A functional dependency is a relationship that exists between two attributes. It usually…

Q: What data types would you use for the attributes in this entity? How would you code a CREATE TABLE…

A: In a database management system (DBMS), an attribute is a piece of data that describes an entity.…

Q: Redundancy O False

A: Explanation: Decomposition is a technique for removing anomalies, inconsistencies, and redundancy…

Q: Q3) consider you have the airport database with the following relations, where the primay keys are…

A: The AVG() function returns the average value of a column.    SQL Query: SELECT AVG(capacity)FROM…

Q: Use the following relational schemas for answering the queries in relational algebra; STUDENT(ID,…

A: Query for the given conditions: SELECT ID , Phone FROM STUDENT WHERE name LIKE '%Kumar%' Here Its…

Q: What features do normalization procedures that use functional dependencies have?

A: Functional reliance: Between two characteristics—primary key attributes and non-key attributes…

Q: Consider the employee database of Figure 2.17. Give an expression in the relational algebra to…

A: Note: There are multiple questions are given in one question. According to the rule, you will get…

Q: Explain how referential integrity is represented in relational model?

A: Referential integrity states that relationships between tables should be consistent. Referential…

Q: Subject: Database Management System Consider the following relations: PERSON(P_id,_F_name,…

A: Database Management Systems (DBMS) are software systems used to store retrieve and run queries on…

Q: he following table, write the relational schema that meets 1NF, 2NF and 3NF requirements. 1NF also…

A: Based on the following table, write the relational schema that meets 1NF, 2NF and 3NF…

Q: Consider the following schema (keys are underlined): Product(pid, name, manufacture, price),…

A: Solution::   Query 1 - Relational ALgebra   π cname σ manufacturer = 'sears' Customer ⨝ Customer.cid…

Q: Here my ERD. Help me to present the relational schema until 3NF, based on ERD below. and Identified…

A:

Q: In SQL Server, DROP TABLE statement deletes only the definition and tuples of a relation. It does…

A: Note ?as per our company guidelines we are supposed to answer ?️only first 3️⃣ sub-parts. Kindly…

Q: The following relational schema form a university database which is implemented in a relational…

A: Here have to determine about sql query for given problem.

Q: Consider the employee relation in the screenshot provided   and answer the questions that follow.…

A: Answer a) Select emp_name, Salary from employee where Salary >=2500.00 and Salary <=4000.00…

Q: the following schema ,write the relational algebra queries for the following:…

A: Every database management system must define a query language to allow users to access the data…

Q: SQL Server provides with three views to display the relations in an SQL Server database. These views…

A: SQL server provides with three views to display relations in an SQL Server Database. These views are…

Q: Using the instance of the Airport database, formulate the following queries in the relational…

A: Your query is given below as you required.

Q: Using the relational database given in lab work no. 2, write the following queries in SQL: 1) Which…

A: Structured Query Language(SQL) A very-high-level language, in which the programmer is able to avoid…

Q: Assume a database of Employees of a company have been given as shown below: Employee: Projects:…

A: Structured Query Language is abbreviated as SQL or also pronounced as See-Qwell. It is developed for…

Q: Write down the SQL commands for the following queries: a) Find the titles of all courses from your…

A: Find the department id which is CSE department Then filter out the records having same department id…

Q: Database Management Systems (SQL) Assume a company sells music albums. Each album consists of a few…

A: NOTE: According to rules, I am only permitted to respond to a certain amount of questions (including…