August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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｜
185
输出到数据库
样潜在的用户才会清楚，从而更有可能在组织内使用。请注意，数据库名称中
的任何空格都将用下划线代替，因为大多数数据库不允许列名中包含空格。
Add data to table
（将数据添加到表中）
如果选择
Add data to table
（向表中添加数据），
Prep Builder
将向现有表的末尾
添加数据，或者在不存在表的情况下创建一个表。该选项通过联合流程内正在
处理的行，将其追加到原始表中，表现为对表的增量更新（见图
20-8
）。
图
20
-
8
：Add data to table（向表中添加数据）的选项
如果添加新列作为流程的一部分，它会将联合后的数据行添加到数据集中。
Replace data in table
（替换表中的数据）
选择
Replace data in table
（替换表中的数据），将用流程处理后的数据集覆盖
表中的当前数据集（见图
20-9
）。
图
20
-
9
：Replace data in table（替换表中数据）的选项
20.3
需要注意的问题
能够将输出数据写入数据库的最主要的风险是意外地覆盖了数据表。与任何数据相
关工作一样，你要对自己的行为及其可能产生的影响负责。你在数据库上的权限很
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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.