Scoring functions have to be linear

As pointed out by one of the students, the scoring functions need to be defined by linear arithmetic expressions to guarantee monotonicity.
So they are of the form

c1* A1+....cn*An

where c1,...cn are positive integer coefficients.

A*B where A and B are attributes is not part of the query language.

--jc

Project #2 extra credit dataset

Please consult the course webpage for a real-world (NBA) dataset that you can use in your experiments.
The instructions are also there.

--jc

Project 2 example

http://www.cse.buffalo.edu/~chomicki/562/project2-example.pdf

the office hour today

Hi, I switch my office hour today to 3:30 to 5:30pm, it is just for today. Sorry for the inconvenience.
Zhouhan

New items on the course web page

1. updated project #2 description
2. Transactions slides/handouts

Please post project #2 questions as comments here

the penalty of late submission

As some of you might concern, the penalty of late submission is as follow:
Late submissions will be scored using a graded approach:
Less than 1 day late: reduce the score by 15%
For each additional day, up to 3 days: reduce the score by further 15%
More than 3 days late: not accepted.


It's a good idea if you submit the unfinished version in time and then submit another version. We will give you the maximum grade for the first one and then add credits for second one with the penalty.


Zhouhan