Learning Tableau 10 - Second Edition by Joshua Milligan

Learning Tableau 10 - Second Edition by Joshua Milligan

Author:Joshua Milligan [Milligan, Joshua]
Language: eng
Format: azw3
Publisher: Packt Publishing - ebooks Account
Published: 2016-09-30T04:00:00+00:00

Most of the examples here will use the sample Superstore data we've used in previous chapters. To follow along with the examples, use the Chapter 05 Starter.twbx workbook.

Overview of table calculations

Table calculations are different from all other calculations in Tableau. Row-Level, Aggregate calculations and LoD expressions, which we considered in the previous chapter, are performed at the data-source layer. If you were to examine the queries sent to the data source by Tableau, you'd find the code for your calculations translated into whatever flavor of SQL the data source used.

Table calculations, on the other hand, are performed after the initial query. Here's an extended diagram, which shows how aggregated results are stored in Tableau's cache:



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