August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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257
使用数据角色
自定义数据角色的选项与默认数据角色相同：
Valid
（有效）、
Not valid
（无效）或
All values
（所有值）如图
28-12
所示。
图
28
-
12
：返回数据角色匹配值的选项
28.3
小结
Tableau Prep Builder
中的数据角色与
Tableau Desktop
的地理角色概念类似，但能更
进一步让你了解是否需要清理数据。通过选择
Not valid
（无效）选项，你可以选择
过滤或清理这些值。选择
Valid
（有效）可以让你放心，即剩余的数据值符合设定的
标准。自定义数据角色可以让组织匹配那些对其重要的值，或者那些原本难以验证
的值。
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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.