我有一栏person_ code的数据集。

I have a dataset with a column "person_code".

这列包含以下数据：

现在，如果我设置数据集的列的主键person_ code我会得到以下错误：

Now if i set the primary key of the dataset to the column "person_code" I'll get the following error:

这些列当前没有唯一值。

"These columns don't currently have unique values."

解决这个办法？最好我能想到的是添加一个新栏目primary_key，然后更换结束/开始另一个标志位。这将导致一些额外的问题：如果我代替他们_而且也已经是Carra_数据库...

Any way around this? The best I can think of is to add a new column "primary_key" and then replace the ending/starting spaces with another sign. This will cause some extra problems: if I replace them with _ and there's already a Carra_ in the database...

有没有更好的办法？

推荐答案

主键始终是唯一的，所以如果两个人有相同的人​​code，那么这确实会导致此问题

Primary keys are ALWAYS unique, so if two person have the same person code then this will indeed cause this problem

现在，他们似乎并不完全一致（就像你说的人有一个尾随的空间。我的猜测是，你的code可能会删除默认的尾部空间，你可能想要把一个符号在开始并在结束时，像卡拉和卡拉，使他们不同的。

Now, it seems that they are not entirely identical (as you say one has a trailing space. My guess is that your code may remove the trailing space by default. You might want to put a symbol at the start and at the end, like 'Carra' and 'Carra ' to make them different.

您可能需要尽管定义另一个symbole了这一点。尝试一个你知道的永远不会在你的数据。

You may need to define another symbole that that though. Try one that you know will never be in your data.