August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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Tableau Prep Builder
入门
｜
21
连接到数据文件和数据库的内容分别在第
5
章和第
6
章中介绍。
图
2
-
5
：Prep Builder 主界面
该界面分为两个部分：
连接窗格（
Conections
，左侧蓝色窗格）
与第一个界面一样，在这里你可以编辑数据连接，添加另一个连接，或选择表
格作为数据输入，使其进入你的数据准备流程中。在图
2-6
中，我选择了加载
Excel
连接，因此我也可以选择使用
Data Interpreter
（数据解释器）在格式化的
Excel
工作表中查找数据表。
画布（
Canvas
，中部）
根据你在数据准备过程中采取的步骤，这个区域将发生很大的变化。
2.4
数据准备的基本步骤
在本节中，我们将深入研究数据准备的几个关键步骤。
22
｜
第
2
章
2.4.1
输入步骤
连接到数据源后，通过将数据源从
Connection
（连接）窗格拖到画布上选择输入。
默认情况下，
Prep Builder
会对输入数据集进行采样，以加快构建工作流的过程。当
运行设置好的输出工作流时，所有的数据将被自动处理。输入步骤如图
2-6
所示。
图
2
-
6
：Prep Builder 的输入步骤界面
该界面的三个关键部分（不包括
Connection[
连接
]
窗格）是：
流程窗格（
Flow
，顶部）
该区域反映了数据准备过程的当前步骤。 ...
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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.