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Power BI 无法建立一对一关系，基数问题

[英]Power BI can't establish a one-to-one relationship, cardinality issue

原文 2020-01-13 10:45:20 3 1 powerbi/ relationship

I've got an issue with establishing relationships in Power Bi that I can't seem to solve.我在 Power Bi 中建立关系时遇到了一个我似乎无法解决的问题。 I've got two tables, Table 1 and Table 2. Table 1 has a column "Consignment ID" and Table 2 has a column "Consignment number".我有两个表，表 1 和表 2。表 1 有一列“寄售 ID”，表 2 有一列“寄售编号”。

The column "Consignment ID" will have a big list of numbers and "Consignment number" will have a smaller list, all of which should match with a corresponding number in "Consignment ID". “Consignment ID”列有一个大的数字列表，“Consignment number”将有一个较小的列表，所有这些都应该与“Consignment ID”中的相应数字匹配。 Therefore, I would like to establish a One-to-One relationship between these two columns and then use this relationship to extract the matching numbers from the "Consignment ID" column.因此，我想在这两列之间建立一对一的关系，然后使用这种关系从“寄售ID”列中提取匹配的编号。 However, Power BI is telling me that the "cardinality isn't valid for that relationship".但是，Power BI 告诉我“基数对该关系无效”。 I'm not sure why that is and I have no idea how to solve this problem.我不确定为什么会这样，我也不知道如何解决这个问题。

Does anyone have any thoughts on how to do that?有没有人对如何做到这一点有任何想法？

Thank you for your support!感谢您的支持！

1 个解决方案

To answer the question and to make it a visible solution:回答问题并使其成为可见的解决方案：

If you really want 1:1 relationship between Table1 and Table2, you can't have duplicates in any of the columns that are related, otherwise it is a N:1 or 1:N relationship.如果你真的想要 Table1 和 Table2 之间的1:1关系，你不能在任何相关的列中有重复，否则它是N:1或1:N关系。