Material : Relational Algebra Course : Database Systems Create a Relational Algebra From Entity Relational Diagram (ERD) Below for: a) Displays books published in the last 5 years from 2020. b) Displays details of customers who have done shopping (using the Join operator) c) Displays email customers who have done shopping (using the Set operator) d) Displays the ISBN book that has never been purchased (using the Set operator)

Q: 10. Sometimes logic for a query can be quite complex. It is possible to produce the desired outcomes…

A: Database: A database is a collection of structured data stored in the computer system. SQL: SQL…

Q: make a relational schema from this pic, like this

A: Let's find quickly what is the difference between a relation table, relational schema, and a…

Q: Display employees where the first name or last name starts with S. (Database System

A: Create table Employee using the CREATE TABLE command. Define character variables Emp, fname and…

Q: Cosider the above given relational database model of Ticket Booking Application to develop an SQL…

A:

Q: Below is a schema for an HR database: employee(empid, fname, lname, managerid, departmentid,…

A: Find:  We have to write an SQL code which outputs the path-of-managers directly to the CEO for…

Q: You are working with a database table that contains customer data. The table includes columns about…

A: Length function: In SQL Query length function is used to return the length of string. Syntax:…

Q: CIS111 Chapter 5 Lab Problems 3. Display the vendor name, number of invoices, average and total…

A: The following example shows three code examples. This first code example returns all rows (no WHERE…

Q: Person Name Date_of_Birth Private_Car Car VIN Model Туре Owner ID Rent Start Date VIN Person ID…

A: The given assignment is related to database where the dependency diagram is given and the…

Q: Metadata about the relations are stored in ________ a. File header b. Data dictionary c. Data query…

A: Given that: Metadata about the relations are stored in ________ a. File header b. Data…

Q: How do i solve this, the solution on the site is cut off

A: SELECT statement: It is used to retrieve information from the table or database. The syntax for the…

Q: Product(pid, name, type, manufacturer, price), Buys(cid, pid), Customer(cid, cname, age, gender) a)…

A: a) π(Customer) (( σ(Product.manufacturer = 'Sears' Product) ⋈ Customer ⋈ Buys )

Q: An attributes in a relation coming from another relation is called: * O foreign key fields…

A: An attributes in relation coming from another relation is called

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: In this project, you will design and implement a database for keeping track of information about a…

A: The entities identified based on the given requirements and its business rules are :- • CUSTOMER •…

Q: Employee: (EID, Name, City, Address) Department: (DID, Department_Name, City, budget) Works IN:…

A: All the above details that are mentioned above in the question we will take to solve the question:…

Q: | functional dependencies, normalize the original and all re to use proper relational notation:…

A: Step by step with explanation is given below

Q: explain the difference between and outer and inner join. Use an example.

A: Join clause: The join clause is a special keyword in a SQL (Structured Query Language), which is…

Q: Consider a database application which maintains the stock (product details) of a Hypermarket. The…

A: As per the requirement, i gave the information that the database application that maintains the…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: The diagram uses Sakila naming conventions. Follow the Sakila conventions for your table and column…

Q: ER Mapping : Convert the ER diagram into a relational database schema. For each relation, specify…

A: Relational Model: Entities: Bank Code Name Addr Bank Branch BranchNo Addr Account…

Q: 10. For employee 42, find the path-of-managers directly to the CEO?

A: Please check the step 2 for solution of question 10

Q: Create Relational Model of the given ERD. Highlight the mandatory foreign keys in your relational…

A: Objective: An entity-relationship diagram is given including several relations like Book, Publisher,…

Q: Hotel(hID, hName, city) primary key is hID Guest(gID, gName, gAddress) primary key is gID Room(hID,…

A: Select guests who stayed at least 1 day in New York City hotels between September 8, 2001, and…

Q: (a) Use STUDENT and LECTURER tables shown below to answer questions (i) and (ii). Table name:…

A: As per our rules, we can answer only the first sub-part in a multi-part question. Please submit the…

Q: Write the following queries. 1. Write a query to get the First Name and Last Name of all employees…

A: As per company rules experts are only supposed to Solve one question.So kindly post another…

Q: Question 3 refers to two data tables giving the details of a company's employees and company's job…

A: Please find the detailed query in the below solution.

Q: 1NF: First Normal Form - Eliminate repeating data and non-atomic values; add keys The data is stored…

A: Solution:- Step 1The ask is to normalize the given data set and derive the 1NF, 2NF and 3NF.

Q: A car-rental company maintains a database for all vehicles in its current fleet. For all vehicles,…

A: For this problem, table inheritance will be used. Suppose that Color, MyDate, and DriveTrainType are…

Q: A USE statement __________     None of these     Identifies the database within which the query is…

A: D. All of these.

Q: hospital.sql/hospital.rtf. 1. Use INSTR to find the position of character 'a' in the doctor's name.…

A: Note: As you have asked a multipart question, as per our policy, we will solve the first three parts…

Q: Question & V Saved Problem 4-7 will use the same database Let a database application be Model…

A: The answer is

Q: Employee table Perform the following 1. Display all the fields of employee table 2. Retrieve…

A: Lets see the solution.

Q: Create a diagram for a database with at least 5 tables. This should show your table names and column…

A: The following illustrates the BikeStores database diagram:               As you can see from the…

Q: database Assume that you have the following relation; R(a,b,c) a   b  c ---------- 1  A   F 2…

A: Division operator A÷B can be applied if and only if: Attributes of B is proper subset of Attributes…

Q: Any relation that is not part of the logical model, but is made visible to a user as a a)Absolute…

A: 6.Any relation that is not part of the logical model, but is made visible to a user as a Any such…

Q: Identify if the following relation is in 1NF: STUDENT(StudentID, FirstName, LastName, (CourseID,…

A:

Q: ВOOK Book id Title Publisher_name

A: Given:- Write the appropriate SQL DDL statements to declare the relational library Database. Diagram…

Q: Q2/ write the schema that descibes the following relations: 1- The course relation course id title…

A: Drawing the schema for given relation Here, PK means Primary Key and FK means Foreign Key.

Q: Suppliers (sid, sname, city) Parts (pid, pname, color) Catalog (sid, pid, price) Write relational…

A: THIS IS A MULTIPLE QUESTION BASED PROBLEM. ONLY FIRST QUESTION IS SOLVED. KINDLY REPOST OTHER…

Q: A relation is a function only if any two first values in the pairs are the same. True or False

A: Given: A relation is a function only if any two first values in the pairs are the same. True or…

Q: Hotel(hID, hName, city) primary key is hID Guest(gID, gName, gAddress) primary key is gID Room(hID,…

A: The SQL Queries are as follows:

Q: Assume that you have the following relation; R(a,b,c) a   b  c ---------- 1  A   F 2  B   M 3…

A: Degree is the total number of attribute/fields of a relationship/table. cardinality is the total…

Q: Student = (SSN, Name, Major) Course = ( CourseNumber, Quarter, CourseTitle, NumberOfUnits,…

A: CREATE TABLE Student(   SSN INT NOT NULL PRIMARY KEY,   Name VARCHAR(100) NOT NULL,   Major…

Q: A relation that contains a minimum amount of redundancy and allows users to insert, modify, and…

A: Lets see the solution.

Q: Question 3 refers to two data tables giving the details of a company's employees and company's job…

A: Required:

Q: LECTURER DEPARTMENT give lesson # employee id • TC ld * title * first name work in • last name # id…

A: Here we have 3 relationship between Department and Lecturer.  The 1st relationship teach in is a M:N…

Q: Question3-A: Map this ER Diagram into a relational schema and specify all primary keys and foreign…

A: The relational Schema is given below with primary and foreign keys

Q: create a Relational Schema by mapping

A: Relational Schema  Relation Primary Key Foreign Key…

Q: Write a Structured Query Language (SQL) statement for each of the following questions: a) Create the…

A: a) CREATE TABLE Appointment Details (     ApptNo int(10) NOT NULL check (ApptNo between 100000 and…

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.