August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
Content preview from Tableau Prep即学即用
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｜
291
实现高级连接
然后，你可以简单地将这两个连接的输出
Union
（联合）起来，也就是将结果叠加
在一起（见图
32-12
）。
图
32
-
12
：Union（联合）多个连接的结果
复制
OR
语句行为的能力使你在分析中具有更大的灵活性。你不必为了能够返回你
所需要的数据而为连接类型和条件的设置费神。
32.4
小结
连接是数据准备的一个基本部分，有一些高级的连接技术可以使复杂的情况更容易
处理。无论是使用多个连接条件来避免创建不必要的重复数据，还是处理
OR
语句，
如果能够处理这些更高级的应用场景，则可以为你的数据集的最终用户节省数小时
的工作时间。
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