August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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122
第
15
章
Prep Builder
中的汇总功能
得益于这两个工具相似的外观和体验，
Tableau
用户可以在
Prep Builder
中为
Desktop
中的可视化分析准备数据，且快速而方便，也就是说，除非某些熟悉的功
能在两个工具中的用法不一样。当我在教授
Prep Builder
时，汇总内容的学习是
我的学生经常感到痛苦的原因。在本章中，我们将介绍
Prep Builder
中的汇总与
Desktop
的不同之处、汇总步骤的工作原理，以及如何应对汇总的最大挑战：将可
能需要进一步分析的任何列添加回
Tableau Desktop
中。
15.1
比较
Prep Builder
和
Desktop
中的计算方法
与
Desktop
一样，如果你不使用任何形式的汇总，
Prep Builder
将在行级数据上进行
计算。例如，如果想计算如图
15-1
所示的简单浴室装修数据集的总成本，只需将一
个成本值与另一个成本值相加，每次一行。
图
15
-
1
：浴室装修数据集
要将这些
cost
（成本）值加在一起，我们将在
Prep Builder
中写出与
Tableau
Desktop
中相同的计算式子（见图
15-2
）。
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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.