August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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315
第
35
章
挑战复杂的数据准备场景
前面几章已经讨论了确定准备分析的数据集所需的各种技术，尽管是在相对简单的
层面。那么那些解决方法并不简单的情况该怎么办呢？如何才能处理这样的问题？
复杂的挑战可能包括构建需要多个步骤的数据处理解决方案，使用多个连接条件输
入数据源，或者在整个数据准备过程中必须完成许多数据重塑的步骤。本章将通过
应对
Preppin' Data
迄今为止所涉及的最复杂的挑战之一，即
2020
：第
3
周挑战赛
（
https://oreil.ly/Q3naF
），来涵盖这一具体场景。这个挑战是由
Jonathan Allenby
（我
的同伴
Prepper
博士）创建的，目的是将
NBA
（
National Basketball Association
，美
国国家篮球协会）的比赛结果转化为你通常在网站或报纸上看到的那种详细排名。
35.1
挑战
这个挑战涉及通过比赛结果来建立完整的会议联赛表，包括排名、胜负、最近的表现，
以及连胜（见图
35-1
）。这确实是一个艰难的挑战，涉及很多方面的因素。因此，
这是一个很好的例子，用来告诉你如何将复杂的问题分解成更小的、更容易处理的
多个部分。
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