CMPT 258 Database SystemsInstructor: Tina Tian

General Information

•Email: tina.tian@manhattan.edu•Office: RLC 203A•Office Hour: Wednesday 1:30 - 4:30 PM

or by appointment•Website: home.manhattan.edu/~tina.tian

About the Course

•Mon, Thur 3:00 - 4:15 PM•Textbook:

▫Database Management Systems, 3rd Edition by Raghu Ramakrishnan and Johannes Gehrke

Grading

•1st Midterm Exam (in class, 5th week)15%

•2nd Midterm Exam (in class, 10th week) 15%

•Final Exam 30%

•Homework 40%

About the Homework

•Only hard copy is accepted. (Complicated ER diagrams can be drawn by hand)

•Make a cover page (name, homework number)

•Due in a week after being announced•Late work will not be accepted

Homework Policy

•You may discuss the homework/projects with other students.

•However, you must acknowledge the people you worked with.

•And you must independently write up your own solutions.

•Any written sources used (apart from the text) must also be acknowledged.

Advises

•Take notes •Start the homework and programming

assignments early

What will be covered

•This course introduces the fundamental concepts of database management▫Introduction to database management

(Chap 1)▫The entity relationship data model and

conceptual schema design (Chap 2)

What will be covered

•The relational data model and relational database design (Chap 3)

•Relational algebra (Chap 4)•SQL queries (Chap 5)

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(sid) sname rating age (sid) bid day

22 dustin 7 45.0 22 101 10/ 10/ 96

22 dustin 7 45.0 58 103 11/ 12/ 96

31 lubber 8 55.5 22 101 10/ 10/ 96

31 lubber 8 55.5 58 103 11/ 12/ 96

58 rusty 10 35.0 22 101 10/ 10/ 96

58 rusty 10 35.0 58 103 11/ 12/ 96

Q6: Find sid’s of sailors who’ve reserved a red boat but not a green boat:

SELECT S.sidFROM Sailors S, Boats B, Reserves RWHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘red’ AND S.sid NOT IN (SELECT S2.sid FROM Sailors S2, Boats B2, Reserves R2 WHERE S2.sid=R2.sid AND R2.bid=B2.bid AND B2.color=‘green’)

What will be covered

•Application development (Chap 6 & Chap 7 & supporting material)▫JDBC (Java)▫Web (PHP)

What will be covered•Database privileges

A database is accessible to many users, and not every user should be allowed to do everything.

▫The owner of the restaurant should be able to view and/or change any data.

▫The restaurant accountant should be able to see, but not change, salary information.

What will be covered• Transactions (Chap 16)

▫Now consider the following scenario: Two customers, Bob and Mary, arrive at about the same time and each go to a different register. Bob orders a Garden Salad. Bob’s register runs Query 11.1, which indicates that there are enough ingredients to make his order. While Bob decides if he wants to order a drink, Mary also orders a Garden Salad. Mary’s register runs Query 11.1, which again indicates that there are enough ingredients to make her order. Mary immediately pays for her order, and her register executes Update 11.2.

Example•We always want to make sure that we

have all of the ingredients for every item before we submit a customer’s order.

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What will be covered

•Schema refinement and normal forms (Chap 19)▫Redundancy causes several problems

associated with relational schemas.▫Functional dependencies, can be used to

identify schemas with such problems and to suggest refinements.

What will be covered

•NoSQL

Software

•MySQL ▫MySQL is the most widely used open-

source relational database management system.

▫free and open source

Download MySQL

•http://dev.mysql.com/downloads/

Readings

•Chapter 1•Download and install MySQL