November 2025
Beginner to intermediate
336 pages
7h 48m
English
book
SQL for Data Analytics - Fourth Edition
by Jun Shan, Haibin Li, Matt Goldwasser, Upom Malik, Benjamin Johnston
Content preview from SQL for Data Analytics - Fourth Edition
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9
Inter-Row Operation with Window Functions
You learned about scalar functions such as CASE WHEN, COALESCE, and NULLIF in Chapter 5, Presenting Data with SELECT. These functions receive data from a single row and produce a result for this row. The result of these functions is only determined by the data value in the row and has nothing to do with the dataset it is in. You also learned aggregate functions such as SUM, AVG, and COUNT in Chapter 8, Aggregating Data, with GROUP BY. These functions receive data from a dataset with multiple rows and produce a single result for this dataset. Both types of functions are useful in different scenarios.
You may also want to know the characteristics of a data point regarding its position in the dataset. ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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