August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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｜
401
存储数据
所以，在考虑到这些方面的同时，现在让我们从另一方面来看看这个事情，即仍然
把数据看作是一种资产，而不是一种债务。通过遵循这一系列“该做”的事来让数
据变得可访问，是任何组织进步和发展的关键。
45.1.3
将数据的访问权授予专家
不熟悉数据中的内容会导致决策失误。这不是技术能力的问题，而是对数据背景的
理解问题。给予业务领域的专家访问数据的权利，并与他们合作，了解每一列数据
到底是做什么用的，最终将确保数据源有文档记录并变得有用。否则，你存储的、
或潜在使用的数据可能会被误解。将数据存储在业务专家无法访问的位置，将导致
“意见驱动”而非数据驱动的决策。
45.1.4
记录你的资料来源
将数据存储在某种不清楚、不明了的方式中，不会带来任何成功。策划数据源，使
最终用户能够理解它们，比节省少量的存储空间更重要。清晰地命名列头、以人性
化的语言在表格顶部创建视图，以及在
Tableau Server
等用户友好的平台上发布数
据源，这些都是用文档记录下数据源并使其更容易访问的方法。
45.2
缓慢
/
无响应的性能
当你决定在哪里存储数据时，一个主要的考虑因素是响应时间。在这个时代，全世
界的人都可以在网上提问并在几秒钟内得到答案，一个需要
20
秒才能加载的数据集
可能会让人感觉很不爽。确保数据集对所进行的查询做出及时的响应，是将数据置
于组织核心的关键。并非所有的数据都处于这种状态，很多数据集都存储在缓慢、
陈旧的数据库上，但作为数据准备者，我们的任务不仅仅是清理输入的数据集，还
要确保输出的数据集是能够及时响应的。最终 ...
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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.
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.