August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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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.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.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.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.
426
｜
第
48
章
图
48
-
5
：Tableau Desktop 中的 Hyper 文件示例
这个历史表会随着每周数据的更新和
Prep Builder
流程的重新运行而增长。
48.6
小结
构建和使用历史表将使你能够进行比其他方式更好、更深入的数据分析。完善存储
在历史表中的数据的相关性、频率和粒度，将确保所获得的分析结果是非常有价值
的，因为你为建立分析所付出的努力是值得的。如果不对历史表进行高粒度级别的
汇总，历史表可能会迅速增长，因此需要在删除数据之前决定有多少历史数据是相
关的。还必须考虑在必须删除数据之前，按照法律规定可以存储多长时间。
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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.