August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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370
｜
第
40
章
图
40
-
8
：通过端口
9004
连接到 localhost
40.3
使用脚本步骤
由于本章是针对
Prep Builder
新手的，所以我们先来介绍一下创建行
ID
的简单方法，
该
ID
可以作为分析的
ID
。在
Prep Builder 2020.1
中，
Prep Builder
增加了使用
ROW_
NUMBER()
函数的功能，但在此之前，我们将在这里介绍的技术是最简单的、将行
ID
添加到一个不存在的数据集中的方法。
你会发现，用
Python
工具在输入中添加一个数据字段比添加多行程序代码行更容易
做到。
｜
371
连接编程脚本
本例的数据集是
Superstore
（超市），它是每次安装
Tableau Desktop
或
Prep
时附带
的演示数据集。该数据集被添加到
My Tableau Prep Repository
的
Datasources
文件
夹中，这是一组添加到计算机的
My Documents
或
Documents
文件夹中的文件。在
这个例子中，我们将在
Superstore
中添加一个名为
New Index
的新数据字段，它可
以作为
Superstore
的参考，每个产品、每个订单都有一个
ID
。
连接到
Superstore
后，添加一个清理步骤来创建一个计算字段，它将用于存放受脚
本影响的值。创建一个只包含值
1
的计算字段，并将其命名为“ ...
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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.