December 2014
Intermediate to advanced
362 pages
8h 12m
English
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The Rank transformation
The Rank transformation is used to get a specific number of records from the top or bottom. Consider that you need to take the top five salaried employees from the EMPLOYEE table. You can use the Rank transformation and define the property. A sample mapping indicating the Rank transformation is shown in the following screenshot:
When you create a Rank transformation, a default RANKINDEX output port comes with the transformation. It is not mandatory to use the RANKINDEX port. We have connected the RANKINDEX port to the target as we wish to give the rank of EMPLOYEES based on their SALARY.
When you use a Rank transformation, ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.