Chapter 6

Refining Result Sets

Billing itself as “the ultimate automotive marketplace,” allows consumers in the United States to buy and sell cars. According to census data, the United States has around 250 million registered motor vehicles, so you can imagine that finding the perfect car can daunt even the most intrepid prospective car buyer. To help car buyers cut through the myriad cars they don't want to find the one they do, provides tools on its web site to filter available cars by criteria such as body style, make, model, year, price, and location.

When dealing with large sets of data, refining result sets is essential for analysts to extract any meaning from the data. Computers, including iDevices, excel ...

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