December 2018
Beginner to intermediate
496 pages
10h 44m
English
Content preview from Tableau 10 Complete Reference
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Union files together
Often, you may have multiple individual files or tables that, together, represent the entire set of data. For example, you might have a process that creates a new monthly data dump as a new text file in a certain directory. Or you might have an Excel file where data for each department is contained in a separate sheet.
The ability to union file-based data sources together was introduced in Tableau 9 and the capabilities are expanded in Tableau 10. A union is a concatenation of data tables that brings together rows of each table into a single data source. For example, consider the following three tables of data:
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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.