Study the relational schema:EMP(ID, Name, DeptID)DEPT(DeptID, DName, Loc)Which of the following join conditions will correctly join the two tables?a. Emp.Name = Dept.DNameO b. Emp.ID = Dept.IDO c. Emp.DeptID = Dept.DeptID%3Dd. Emp.ID = Dept.DeptID%3! These statements begin with INSERT, UPDATE, DELETE, or MERGE and are used to modify the table data by entering newrows, changing existing rows, or removing existing rows.a. Data manipulation language (DML)O b. Data control language (DCL)O c. Data definition language (DDL)O d. Transaction control language (TCL)

Given: 1) Which of the following join conditions will correctly join the two tables? Emp.Name =…

Answered: Study the relational schema: EMP(ID,…

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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Consider the following relational schema and answer the following questions. Employee (Employee_Id, First_Name, Last_Name, Email, Phone_Number, Hire_Date, Job_Id, Salary, Commission_Pct, Manager_Id, Department_Id) a. Write a query to find the manager ID and the salary of the lowest-paid employee for that manager. b. Write a query to get the department ID and the total salary payable in each department. c. Write a query to get the average salary for each job ID excluding programmer. d. Write a query to get the total salary, maximum, minimum, average salary of employees (job ID wise), for department ID 90 only.
Three tables are given Student: studentNO, firstName, lastName, studentProgram Professor: professorID, professorProgram, professorName Student_professor: studentNO, professorID, mentor Complete the following requirements: Using the UNION operator, do a full outer join to display the student last name student program, professor name and professor program. Referring to the model created in step 2, determine the PK/FK relationships to build the SQL joining the three Create a query/subquery to display student first name, last name and program. The student program must be same as that in the professor table and the professor program name starts with a ‘C’. This query will use a subquery and not a join.
Please help with the folllowing: Consider the following declaration of a relation schema CREATE TABLE R ( A int PRIMARY KEY, B int not null, C char (1) ); Then execution of which of the following queries will fail? QI: Insert INTO R (B, C) Values (353, 'B'); Q2: Insert INTO R (A, C) Values (111, ‘A’); Q3: Insert INTO R (A, B) Values (222, 335); Select one: a. Both QI and Q2 b. QI only c. Both QI and Q3 d. Q2 only
b) Consider the relational table PARTSUPP of the TPCHR sample database. Find SELECT statements that will use the index in the ways specified in the questions (i) to (iv) below. The values used to create the query such that the queries can meet the specified criteria is up to you, but the values must be sensible. i. ii. iii. iv. Execution of the first SELECT statement must traverse the index vertically then horizontally and it must not access the relational table PARTSUPP. Execution of the second SELECT statement must traverse the index vertically then horizontally and it must access the relational table PARTSUPP. Execution of the third SELECT statement must traverse the leaf level of the index horizontally and it must not access the relational table PARTSUPP. Execution of the fourth SELECT statement must traverse the leaf level of the index horizontally and it must access the relational table PARTSUPP. Deliverables Submit your spooled file solution 1b.lst (or solution 1b.pdf) that…
I am having some trouble with this for an assignment in Database. I am trying to create some queries for this homework: Assignment 5: Data Definition language and Transaction in MySQL This is what I am currently working on: On June 3, 2019, customer ‘10010’ makes a payment of $100 in cash. The payment ID is 3428. The query as it is as of this moment: SELECT PAYMENTINSERT INTO PAYMENT (PMT_ID,PMT_DATE,CUS_CODE,PMT_AMT,PMT_TYPE,PMT_DETAILS)VALUES(3428,6-3-2019,10010,100.00,cash,account),UPDATE CUSTOMERSET CUS_BALANCE = CUS_BALANCE + 100WHERE CUS_CODE=10010,COMMIT 2. On May 11, 2019, customer ‘10012’ makes a credit purchase of one unit of product ‘11QER/31’ with a unit price of $110.00; the invoice total is $118.80. The invoice number is 10983, and this invoice has only one product line. [note: no payment has been made here] The Query as of now: BEGIN TRANSACTION; INSERT INTO VOICE VALUES (10983, 10012, ’5-11-2019’), INSERT INTO LINE VALUES (10983, 1, ‘11QER/31’, 1, 110.00), UPDATE…
Simplify the following query (WHERE clause), expressed in SQL, on the example database above: SELECT ENAME, PNAME FROM EMP, ASG, PROJ WHERE (DUR > 12 OR RESP = "Analyst") AND EMP.ENO = ASG.ENO AND (TITLE = "Elect. Eng." OR ASG.PNO < "P3") AND (DUR > 12 OR RESP NOT= "Analyst") AND ASG.PNO = PROJ.PNO
(a) Write the sql syntax to create a table name Client with the following restrictions; Client(cid, cname, address, age, occupation, salary, payment_mode) Where cid is the primary key. cname do not accept null values. Payment_mode accepts only cash or credit entries. The default address is “vacoas". client is at least 25 years old. Salary is above Rs 30000. (b) Consider the schema of Customer table in part(a) and write SQL statements for the following queries. i. Using SQL, write the command to add a new column in the client table with the following data definition; (Column “gender" of char data type and field size of 1). ii. Using SQL, write the command to insert the values in the Client table. cid address age occupation salary Payment_mode gender cname 123 sam vacoas 31 manager 60000 cash m 124 david flacq 38 administrator 45000 credit m iii. Write the SQL query to display the cid of all employees. iv. Write the SQL code to list all administrators whose salary is greater than Rs…
All parts of this question use the following database schema: Flights(flno, from, to, distance) Aircraft(aid, aname, cruisingrange) Certified(eid, aid) Employees(eid, ename, salary) c) For each cruisingrange held by at least 3 aircraft, give the lowest salary of employees certified to fly one of those aircraft. Express in SQL only:
2. Consider the following schema: Books (book id, title, year, pub_id, auth_id, price) Authors(auth_id, name, nationality) Publisher(pub_id, name) Sales(copies_sold, book_id, copies_printed) Write down the relational algebra expressions for the following queries a) Give the count of the books published by Pearson each year. b) Name the authors who wrote some book in 2015 and 2016 priced above 200 rupees. c) List the title, author name and publisher name of books written by Indian authors in the year 2019 d) List the publisher IDs with least number of books printed in 2020 e) List the publisher who made profit<500 (profit= book price* (copies printed – copies sold) f) List the author whose books are priced the highest.
Consider the following schema of hotel reservations database: Hotel (Hotel No, Name, City) Room (Room No, Hotel No, Type, Price) Booking (Hotel No, Guest No, Date From, Date_To, Room No) Guest (Guest_No, Name, City) Write RA queries for the following: a) Get the details (names and price) of all hotels in California. b) Get the average price of a room grouped by city. c) Find the hotel name and city of the hotel with the highest priced room. d) Get the hotel names and room numbers of any hotel rooms that have not been booked.
Which of the following can be the output of an operation in relational algebra?(a) An attribute(b) A relation(c) An expression(d) All of the above
Define the term referential integrity constraint. Give an example of a referential integrity constraint for the tables you created for question 1.8.

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