August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.
373
第
41
章
处理
Prep Builder
错误
软件中的错误很糟糕。谁没有过对着键盘哭泣，或用头撞着屏幕请求计算机之神解
决他们的问题的时候呢？同意——没有这样的人！由于我经常使用
Prep Builder
，所
以对人们使用该工具时常犯的错误有了很好的认识。本章将讨论以下问题场景，并
提出一些可能的解决方案：
•
参数错误。
•
空白的概况窗格和数据窗格。
•
计算字段内的错误。
41.1
参数错误
你可能会经常看到包括
parameter
（参数）一词的错误信息。例如，图
41-1
中的
错误信息是这样的：
Function 'DATEADD' can't accept parameters: (string,
integer, string)
。
在这种情况下，参数就是你在计算中输入的数据字段、数字和字符串。这个计算期
望这些字段有特定的数据类型，不能接受非预期的数据类型。在这个具体案例中，
我的同事在一个字符串字段中使用了一个日期。
DATEADD()
函数明确地要求有一个
有效的日期值作为参数，从而让计算结果递增。
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.