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Practical Oracle SQL: Mastering the Full Power of Oracle Database
book

Practical Oracle SQL: Mastering the Full Power of Oracle Database

by Kim Berg Hansen
February 2020
Intermediate to advanced
467 pages
8h 30m
English
Apress
Content preview from Practical Oracle SQL: Mastering the Full Power of Oracle Database
© Kim Berg Hansen 2020
K. Berg HansenPractical Oracle SQLhttps://doi.org/10.1007/978-1-4842-5617-6_12

12. Answering Top-N Questions

Kim Berg Hansen1 
(1)
Middelfart, Denmark
 
I think it is extremely few developers that haven’t been asked to create a Top-N report. The questions by the business that can be classified as a Top-N question are legion such as the following:

  • Which of our products sell the most?

  • Which user profiles create the most tweets?

  • Which sales employees generate most leads?

  • Which hotels in the chain have the least complaints?

The last one could strictly speaking be called a Bottom-N question, but that is in principle exactly the same. For a Top-N report, you order the data by a specific descending order and pick the Top-N rows of data. If ...

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Publisher Resources

ISBN: 9781484256176Purchase LinkPublisher Website