This zipped file contains data and some mathematica codes for the paper:

"Adaptive Sampling Algorithm for answering Aggregation Queries on Web Sites",
F. Afrati, P. V. Lekeas, C. Li, Elsevier KDE, 2008

inside the file are:

A folder named "Amazon_real_data". This folder contains some of the real data downloaded from Amazon.com hierarchy on April 2004, that were used in many experiments.

A folder named "Synthetic_data". This folder contains some synthetic data files along with the mathematica source file that produced them.

A folder named "combined_queries". This folder contains some experiments (mathematica source files, and data sets) concerning the combined query case that is mentioned in the paper.

P. V. Lekeas