1. CS 3630 Database Design and Implementation

2. DreamHome
Branch (branchNo, street, city, state, zipcode, phone1, phone2, phone3)
Staff (staffNo, firstName, lastName, position, address, DOB, salary,
branchNo, branchAddress, branchPhone)
Owner (ownerNo, firstName, lastName, address, telNo)
PropertyForRent (propertyNo, street, city,state, zipcode, type, rooms, rent,
ownerNo, ownerAddress, ownerName, ownerPhone, staffNo)
Client (clientNo, firstName, lastName, telNo, prefType, maxRent,
staffNo, dateJoined, branchInfo)
Viewing (clientNo, propertyNo, viewDate, comment)
Lease (leaseNo, clientNo, propertyNo, rent, paymentMethod, deposit,
duration, startDate, endDate)
Newspaper (paperName, address, phone, contact)
Common Attributes

3. Relational Algebra Operations
Selection
Projection
Union
Set difference
Intersection
Cartesian product
Inner Join
Outer Join
 (predicate) (R)
(Att1, Att3) (R)
R S
R - S
R S
R S
R S

4. Query Examples
Produce a list from Staff, showing only lastName, firstName, staffNo, and salary.
Staff (staffNo, firstName, lastName, position,address, DOB, salary,
branchNo, branchAddress, branchPhone)
lastName, firstName, staffNo, salary (Staff)
Order of attributes

5. Query Examples Produce a list of all Staff.
Staff (staffNo, firstName, lastName, position,address, DOB,
salary, branchNo, branchAddress, branchPhone)
Retrieve all attributes when not specified.
* (Staff)
lastName, firstName, staffNo, salary, position, address, DOB, branchNo, branchAddress, branchPhone (Staff)
Different order of attributes

6. List all staff with a salary greater than $30,000.
Staff (staffNo, firstName, lastName, position,address, DOB,
salary, branchNo, branchAddress, branchPhone)
(salary > 30000) (Staff)
All attributes when not specified
(salary > $30000) (Staff)
// NO!
(salary > 30,000) (Staff)

7. List lastName, firstName, staffNo and salary of all staff with a salary greater than $30,000.
lastName, firstName, staffNo, salary ((salary > 30000) (Staff))
(salary > 30000) (lastName, firstName, staffNo, salary (Staff))

8. List the details of all staff members who manage a property in Madison.
Staff (staffNo, firstName, lastName, position, address, DOB, salary,
branchNo, branchAddress, branchPhone)
PropertyForRent (propertyNo, street, city,state, zipcode, type, rooms, rent,
ownerNo, ownerAddress, ownerName, ownerPhone, staffNo)
Common attribute?
Staff PropertyForRent
Staff.* ( city = ‘Madison’(Staff PropertyForRent))
Staff ( staffNo ( city = ‘Madison’ (PropertyForRent)))

9. Staff.* ( city = ‘Madison’(Staff PropertyForRent))
all attributes from both tables
Staff.* ( city = Madison(Staff PropertyForRent))
What is Madison?
An identifier
Staff.* ( city = “Madison” (Staff PropertyForRent))
What is “Madison”?
Could be anything but a string

10. List the clientNo, lastName and firstName of all clients who have viewed a property.
Client (clientNo, firstName, lastName, telNo, prefType, maxRent,
staffNo, dateJoined, branchInfo)
Viewing (clientNo, propertyNo, viewDate, comment)
 Client.clientNo, lastName, firstName
( Client.clientNo = Viewing.clientNo (Client  Viewing))
Client.clientNo, lastName, firstName (Client Viewing))
One client may have reviewed a number of properties,
but should be in the result at most once.

11. List the clientNo, lastName and firstName of all clients who have viewed a property.
Also include the properties (propertyNo) they viewed with the date and their comments on the properties
Client (clientNo, firstName, lastName, telNo, prefType, maxRent,
staffNo, dateJoined, branchInfo)
Viewing (clientNo, propertyNo, viewDate, comment)
Client.clientNo, lastName, firstName, propertyNo, viewDate, comment
(Client Viewing)
One client may have reviewed a number of properties,
And may be in the result multiple times.

12. List all Properties that have been viewed this year.
Assume there is a function CurrentDate that returns the current date, including year, month, and day.
PropertyForRent (propertyNo, street, city,state, zipcode, type, rooms,
rent, ownerNo, ownerAddress, ownerName, ownerPhone, staffNo)
Viewing (clientNo, propertyNo, viewDate, comment)
Common attribute?
PropertyForRent.* (viewDate.Year = CurrentDate.Year
(PropertyForRent Viewing))
PropertyForRent (join) ( ( propertyNo (viewDate.Year = CurrentDate.Year Viewing))

13. Produce a status report on all properties
Each property
Show propertyNo, street, city
Also show clientNo, viewDate, and comment from each viewing
if the property has been viewed,
(Otherwise, use null for the three fields)
PropertyForRent (propertyNo, street, city,state, zipcode, type, rooms, rent,
ownerNo, ownerAddress, ownerName, ownerPhone, staffNo)
Viewing (clientNo, propertyNo, viewDate, comment)
PropertyForRent.propertyNo, street, city, clientNo, viewDate, comment
(PropertyForRent Viewing)

14. List all pairs of clients (firstName, lastName, telNo) and owners (firstName, lastName, telNo)
if the client has viewed a property owned by the owner. (Use C for Client and O for Owner)
Client (clientNo, firstName, lastName, telNo, prefType, maxRent,
staffNo, dateJoined, branchInfo)
Owner (ownerNo, firstName, lastName, address, telNo, type )
Viewing (clientNo, propertyNo, viewDate, comment)
PropertyForRent (propertyNo, street, city,state, zipcode, type, rooms, rent,
ownerNo, ownerAddress, ownerName, ownerPhone, staffNo)
Client Viewing PropertyForRent Owner
 C.firstName, C.lastName, C.telNo, O.firstName, O.lastName, O.telNo
( (Client Viewing) (PropertyForRent Owner) )
Common attributes?

15. List all pairs of clients (firstName, lastName, telNo) and owners (firstName, lastName, telNo)
if the client has viewed a property owned by the owner. (Use C for Client and O for Owner)
Client (clientNo, firstName, lastName, telNo, prefType, maxRent,
staffNo, dateJoined, branchInfo)
Owner (ownerNo, firstName, lastName, address, telNo)
Viewing (clientNo, propertyNo, viewDate, comment)
PropertyForRent (propertyNo, street, city,state, zipcode, type, rooms, rent,
ownerNo, ownerAddress, ownerName, ownerPhone, staffNo)
Client Viewing PropertyForRent Owner
Client (Viewing PropertyForRent ) Owner
(Client PropertyForRent ) (Viewing Owner)
What’s the common attribute?

16. Assignment 2
Due Wednesday, by noon
How to get the symbols?  