Tuesday, February 21, 2012

Friday, February 17, 2012

HW1 problem1.2 correction

Regarding the problem 1.2, this problem should select the students who have taken both cse531 and cse562 and get better grade in 562 and the students who have taken one of these two courses or who have taken none of them. My previous understanding is wrong. Sorry about this.

Thursday, February 16, 2012

Update to homework #1

Please see the course web page for an update to homework #1 (Problem 5).

--jc

Wednesday, February 15, 2012

About tora

Regarding tora, try follow the instructions on the link Prof. Chomocki provided. When you open the tora, try to create a new connection at  first. The connection provider is Oracle(TNS), user name is your ubit name, password is cse562r1, and choose the databse AOS.buffalo.edu. After you create a connection, use the sql editor to edit your sql, and you can access the tables via zhouhany.student, zhouhany.prereq, zhouhany.course, zhouhany.enroll.
Zhouhan

Tuesday, February 14, 2012

Monday, February 13, 2012

New handouts: Indexing

Copies of slides and handouts on Indexing are available on the course web page.
--jc

Wednesday, February 8, 2012

Dataset for homework 1

We have set up a small database that you can test question 1 and 2 of homework on. You can get to the tables using the names zhouhany.student, zhouhany.enroll, zhouhany.course and zhouhany.prereq. If you cannot get to these tables, please contact any TA and we will re-grant you the privilege.

Wednesday, February 1, 2012

office hour

We will hold office hours at Davis 302 at following time slots:
Mon 2pm-3pm
Thur 12pm-2pm
Fri 2pm-3pm