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Book Overview & Buying
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Table Of Contents
Data Analysis Using SQL and Excel - Second Edition
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The previous chapter introduced the SQL language from the perspective of data analysis. This chapter uses SQL for exploring data, the first step in any analysis project. The emphasis shifts away from databases in general. Understanding what the data represents—and the underlying customers—is a theme common to this chapter and the rest of the book.
The most common data analysis tool, by far, is the spreadsheet, particularly Microsoft Excel. Spreadsheets show data in a tabular format. They give users power over the data, with the ability to add columns and rows, to apply functions, to summarize, create charts, make pivot tables, and color and highlight and change fonts to get just the right look. This functionality and the what-you-see-is-what-you-get interface make spreadsheets a natural choice for analysis and presentation.
Spreadsheets, however, are less powerful than databases because they are...
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