Consider the following schema and answer the following questions: Project(projld: integer, proj_name: varchar) Employee(empld: integer, jobTitle: varchar, salary: number, projld: integer, deptld: integer) Department(deptid: integer, dept_name: varchar) a. Write the following queries in relational algebra. i. Find the jobTitle of employees who worked in project with id= "2654". ii. Find the IDs of employees who are earn salaries more than 1000. i. Find IDs of projects who accomplished by employee with id = "7452". b. Write SQL queries for the following statements. i. Display all the employee's details in the decreasing order of their salary. ii. Count and display the number of employees worked in each project. i. Add the given new department's data into the Department table. deptld Dept_name Human Resources 123

Consider the following schema and answer the following questions: Project(projld: integer, proj_name: varchar) Employee(empld: integer, jobTitle: varchar, salary: number, projld: integer, deptld: integer) Department(deptid: integer, dept_name: varchar) a. Write the following queries in relational algebra. i. Find the jobTitle of employees who worked in project with id= "2654". ii. Find the IDs of employees who are earn salaries more than 1000. i. Find IDs of projects who accomplished by employee with id = "7452". b. Write SQL queries for the following statements. i. Display all the employee's details in the decreasing order of their salary. ii. Count and display the number of employees worked in each project. i. Add the given new department's data into the Department table. deptld Dept_name Human Resources 123

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question 2 Structured Query Language (SQL) is a standard computer language for relational database management and data manipulation. SQL queries are used to insert, update and modify data. By referring to the Table1 below, write the SQL statements for the following: Table 1: Students ID Names PhoneNumber Country Somalia Age 1234 Aishah 0131234561 18 Absya Ah Meng Bee Chean Malaysia China 4567 0131234562 21 8910 01312345673 20 1112 01312345674 Korea 19 1314 Buchanan 0131234565 Korea 20 (a) Add new column: Ambition Varchar (20). (b) Display Names and Ambition for 20 year old students using SQL. (c) Delete Table Students. (d) Delete column country. (e) Use SQL statements to update all Country names in the Students table from Korea to Malaysia.
Q2: Design Database for the following scenario and Write SQL queries. Create an ERD for the following scenario. Suppose there is a grocery store near your house. Following can be considered for ERD: A grocery store may have more than one employee. A grocery store has exactly one manager. The manager has one or more sales men working under him. Grocery store has more than one portion for the products. • Each product has a barcode, name, expired date. Many customers can busy many products, but each product is bought by only one customer. Each customer will get an invoice for his /her purchase. The bill invoice has an id.
Question 14 Consider the following schema and answer the following questions: Project(projld: integer, proj_name: varchar) Employee(empld: integer, jobTitle: varchar, salary: number, projld: integer, deptld: integer) Department(deptld: integer, dept_name: varchar) a. Write the following queries in relational algebra. I. Find the jobTitle of employees who worked in project with id= "2654". ii. Find the IDs of employees who are earn salaries more than 1000. i. Find IDs of projects who accomplished by employee with id = "7452".
Consider the following ERD; consider additional attributes if needed Write relational algebra expressions on following: 1) Find the test details that has performed on patient 'Arisha' 2) Find the total test amount of patient 'Nishant'. a) Find the doctors details with dss='d01' with list of his patients insurance date-admitted name date-checked-out ss# patients test-log Dr-Patient test_id performed by doctors test dss# specialization name test_name date time result
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)
J SHORTAND NOTATION FOR RELATIONAL SQL TABLES Notation Example Meaning Underlined A or A, B The attribute(s) is (are) a primary key Superscript name of relation AR or AR, BR The attribute(s) is (are) a foreign key referencing relation R As an example, the schema R(A, B, C, D, ES) S(F, G, H) corresponds to the following SQL tables: CREATE TABLE R ( A <any SQL type>, B <any SQL type>, C <any SQL type>, D <any SQL type>, E <any SQL type>, PRIMARY KEY(A), FOREIGN KEY (E) REFERENCES S(F) ); CREATE TABLE S ( F <any SQL type>, G <any SQL type>, H <any SQL type>, PRIMARY KEY(F)) EXERCISE Consider the following relational schema, representing five relations describing shopping transactions and information about credit cards generating them [the used notation is explained above]. SHOPPINGTRANSACTION (TransId, Date, Amount, Currency, ExchangeRate, CardNbrCREDITCARD, StoreIdSTORE) CREDITCARD (CardNbr, CardTypeCARDTYPE, CardOwnerOWNER, ExpDate, Limit)…
SQL: Consider the following relational schema: Staff (staffNo, name, dept, skillCode) Skill (skillCode, description, chargeOutRate) Project (projectNo, startDate, endDate, budget, projectManagerStaffNo) Booking (staffNo, projectNo, dateWorkedOn, timeWorkedOn) where: Staff contains staff details and staffNo is the key. Skill contains descriptions of skill codes (e.g. Programmer, Analyst, Manager, etc.) and the charge out rate per hour for that skill; the key is skillCode. Project contains project details and projectNo is the key. Booking contains details of the date and the number of hours that a member of…
For the following relational model: Student(sid, fname, lname, gpa)Course ( cid, code, name, credithours)Enrolled (sid, cid,grade) Write SQL queries for the following: Print all the students by the name order desc by the gpa. Print all the computer sciences courses, these courses with code start with ‘CS’sorted alphabetically. Print all the students with a gpa less than 3.0 Print all the students with a gpa of a least 3.0 Find all students that have enrolled in database course Find all students that have enrolled in database and network courses Find all the students that have (A or more) at least once
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Q9: You are asked to normalize the following Table into 3rd Normal Form. position salary Hours Worked Staff name No $1500 Tom Daneils Supervisor S0003 Sally Adams Manager S0010 Mary Martin Analyst $1500 Tom Daneils $2250 Robert Chin S0415 Sally Stern S3250 Art Peter S0010 Mary Martin S0415 Sally Stern a. b. C. d. e. Which of the following relations will NOT be part of the solution in the 3nd Normal Form? position Toy staffNo Alien Alien Alien Car Car branch No branch No staffNo Products Table 3500 20 Supervisor 4500 24 Manager 5000 11 Engineer 3000 14 4500 30 Supervisor Analyst 3500 23 Engineer 3000 21 Engine Engine 4500 12 5000 10 Part salary ন HoursWorked branchAddress name branchTelNo Branch Branch No Address B001 B001 B001 B004 8Th road, London, UK 8th road, London, UK 8th road, London, UK 5th road, Leeds, UK Central London, UK Central London, UK Avenue, Manch, UK 5th road, Leeds, UK B002 B002 B003 B004 B003 Avenue, Manch, UK Q10: Based on the following TWO Tables (Products and…
A company that provides a movie-streaming subscription service uses a relational database to store information on movies to answer customer questions. Each entry in the database contains the following items: Movie ID (the primary key), movie title, year made, movie type, MPAA rating, starring actor #1, starring actor #2, starring actor #3, and director. Movie types are action, comedy, family, drama, horror, science fiction, and western. MPAA ratings are G, PG, PG-13, R, NC-17, and NR (not rated). Using a graphics program, develop an entity-relationship diagram for a database application for this database.
SpecificationFunctional DependencyConsider the relational schemas given below and the respective sets of functional dependencies valid in the schemas. For each one of the relational schemas identify its highest normal form. Remember that the identification of a normal form requires analysis of the valid functional dependencies and the minimal keys. TRUCK(registration#, type, owner, driver, date-used)The values of attributes of a relational table TRUCK satisfy the following properties:- a truck has a unique registration number,- a truck has only one owner,- a truck is used only once per day,- an owner owns many trucks and driver uses many trucks.