QUESTION 1: Consider the database whose database state shown in appendix and answer the following questions: 1. Retrieve the name of all employees who work in "Research" Department.

Topic: Database Design Provide an example of a 3 table OUTER join. Explain how it works and what the order of of the joins is.

need solution for  problem 19 of chapter 7 of book- Database Systems: Design, Implementation, and Management, 13th Edition, by Carlos Coronel and Steven Morris

A concise explanation of the many reasons why the use of tables in database design is a good idea could be of some use. Would you mind providing a brief remark on the subject of NULL?

In the Testa EV database described in the previous question, fill in the blanks in the following MySQL statement to list (in this order) all the part numbers of components of 'EV Dashboard' (with Part_No=1) and their quantities; sort the results in ascending order of quantity of components (i.e., components with small quantities are listed first). (Please ensure correctness in the spelling of all names and commands. Do not enter unnecessary symbols such as spaces or commas)

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:

StayWell also rents out properties on a weekly basis to students attending summer school in the Seattle area. Design a database to meet the following requirements, using the shorthand representation and a diagram of your choice. For each student renter, list his or her number, first name, middle initial, last name, address, city, state, postal code, telephone number, and e-mail address. For each property, list the office number, property address, city, state, postal code, square footage, number of bedrooms, number of floors, maximum number of persons that can sleep in the unit, and the base weekly rate. For each rental agreement, list the renter number, first name, middle initial, last name, address, city, state, postal code, telephone number, start date of the rental, end date of the rental, and the weekly rental amount. The rental period is one or more weeks.

Write SQL update statements to do the following on the database schema shown in Figure 1.i. Insert a new course, <‘Knowledge Engineering’, ‘CS4390’, 3, ‘CS’>.ii. Delete the record for the student whose name is ‘Smith’ and whose student number is 17.

The following tables form part of a database held in a relational DBMS: Hotel (h)  hotelNo, hotelName, cityRoom (r)  roomNo, hotelNo, type, priceBooking (b)  bookingNo, hotelNo, guestNo, dateFrom, dateTo, roomNoGuest (g)  guestNo, guestName, guestAddress where the bolded attributes are the primary keys for the respective tables. Using the above tables, answer the following questions: 1. List the names and addresses of all guests in London, alphabetically ordered by name. 2. List all double or family rooms with a price below $40.00 per night, in ascending order of price. 3. What is the total revenue per night from all double rooms?

The following relations are part of a general store database: customer(custnum, custname, city, creditlimit) orders(ordernum, orderdate, filled, custnum) orderline(ordernum, productnum, quantity, salesprice) product(productnum, descr, producttype, msrp, onhand) Here is a sample data (assume there are more records)Using PROJECT, SELECT and JOIN, write the sequence of operations to answer each of the following questions: 1a. What are the names and customer numbers of customers who are from Mississauga? 1b.What are the names of products (descry) and product types of products purchased by customers from brapton?