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Table Of Contents
Data Analysis Using SQL and Excel - Second Edition
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This chapter discusses one of the most important characteristics of customers—where they live. Geography is a complicated topic; this chapter shows how to use geographic data in SQL and Excel.
Using geography starts with geocoding addresses to locate them in the world. Geocoding translates points into latitudes and longitudes and identifies census blocks, and tracks, and counties, and other geographic entities. Using the scatter plot mechanism in Excel, the latitudes and longitudes can even be charted, in a way that resembles a map.
One of the advantages of using geography is that the Census Bureau provides demographic and other data about customers’ neighborhoods and other regions. Fortunately, one level of the census geography is the zip code tabulation area (ZCTA), and these match most of the zip codes in databases. Information such as the population of the area, the median income, the type of heating, the level of education—and much more—...
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