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Data Analysis Using SQL and Excel

Data Analysis Using SQL and Excel - Second Edition

By : Gordon S. S. Linoff
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Data Analysis Using SQL and Excel

Data Analysis Using SQL and Excel

By: Gordon S. S. Linoff

Overview of this book

Data Analysis Using SQL and Excel, 2nd Edition shows you how to leverage the two most popular tools for data query and analysis—SQL and Excel—to perform sophisticated data analysis without the need for complex and expensive data mining tools. Written by a leading expert on business data mining, this book shows you how to extract useful business information from relational databases. You'll learn the fundamental techniques before moving into the "where" and "why" of each analysis, and then learn how to design and perform these analyses using SQL and Excel. Examples include SQL and Excel code, and the appendix shows how non-standard constructs are implemented in other major databases, including Oracle and IBM DB2/UDB. The companion website includes datasets and Excel spreadsheets, and the book provides hints, warnings, and technical asides to help you every step of the way. Data Analysis Using SQL and Excel, 2nd Edition shows you how to perform a wide range of sophisticated analyses using these simple tools, sparing you the significant expense of proprietary data mining tools like SAS.
Table of Contents (18 chapters)
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1
Foreword
17
EULA

Dates and Times in Databases

The place to start is the timekeeping system: how the passage of time is measured. Within a day, the system is rather standardized, with 24-hour days divided into 60 minutes and each minute divided into 60 seconds. The big issue is the time zone, and even that has international standards.

For dates, the Gregorian calendar is the calendar prevalent in most of the developed world. February follows January, school starts in August or September, and pumpkins are ripe at the end of October (in much of the Northern Hemisphere at least). Leap years occur just about every four years by adding an extra day to the miniature winter month of February. This calendar has been somewhat standard in Europe for several centuries. But it is not the only calendar around.

Over the course of millennia, humans have developed thousands of calendars based on the monthly cycles of the moon, the yearly cycles of the sun, cycles of the planet Venus (courtesy of the Mayans), logic, mere...

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Data Analysis Using SQL and Excel
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