December 2017
Beginner to intermediate
500 pages
12h 10m
English
book
Learning Pentaho Data Integration 8 CE - Third Edition
by Dan Keeley, Diethard Steiner, María Carina Roldán, Miguel Gaspar, Pablo Castagnaro, Paula Clemente, Paulo Alexandre de Oliveira Rodrigues Pires
Content preview from Learning Pentaho Data Integration 8 CE - Third Edition
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Filtering data based on row numbers
Until now you've been filtering upon conditions on the values of the fields. You could also filter rows based on the row numbers. There are a couple of steps that allow us to do that. Here is a brief summary of them:
|
Step |
Description |
|
Sample rows (Statistics category) |
This step samples the rows based on a list of row numbers or row number ranges. For example, 1,5,10..20 will filter row 1, row 5, and all the rows from 10 up to 20 (10 and 20 included). |
|
Reservoir Sampling (Statistics category) |
This step allows you to sample a fixed number of rows. The step uses uniform sampling, which means that all incoming rows have an equal chance of being selected. |
|
Top / Bottom / First / Last filter ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.