问题描述
我拥有外部连接的3个数据源-销售，成本，价格明细，以确保我不会错过任何一个数据源中的任何行.我的案例示例如下:
I have outer-joined 3 data sources - Sales, Cost, Price details to make sure I don't miss any rows from either of data sources. A sample of my case looks as below:
如上图所示，在外部加入之后，我找到了品牌E的成本和价格信息，但是没有出售品牌E，这是因为销售"数据中的品牌"列在成本"和价格"细节上都相对于品牌"E"显示为空.
As per above image, after outer joining I find Cost and Price info for Brand E but there is no sale of Brand E as a reason Brand column from Sales data appears null against Brand 'E' at both Cost and Price details.
我想创建一个名为"Brand_New"的新列，其中应填充销售中从A到D的所有品牌，还应填充成本"详细信息中的"E"品牌，而来自价格详细信息中的"E"品牌也应填充在"Brand_New"中'.
I want to create a new column called 'Brand_New' where all Brand from A to D as in Sales should get populated also Brand 'E' from Cost details and Brand 'E' from Price details should also get populated under 'Brand_New'.
我在Tableau中写了一个逻辑: IF([Brand] ='null')THEN [Brand(cost)] ELSE [Brand(price)] END
I wrote a logic in Tableau as: IF ([Brand] = 'null') THEN [Brand (cost)] ELSE [Brand (price)] END
但这没有帮助，有人可以帮我一个逻辑上的帮助.请让我知道更多详细信息.
But this did not help, could anyone please help me with a logic for this. Please let me know for any further details.
推荐答案
因此，您需要[Brand]，[Brand(cost)]和[Brand(price)]中的非空值.您可以将以下内容用于[Brand_new]计算的定义:
So, you need a non-null value from [Brand], [Brand(cost)] and [Brand(price)].You could use something like this for the definition of [Brand_new] calculation:
IFNULL([Brand],IFNULL([Brand(cost)],[Brand(price)]))
这篇关于通过从Tableau中的3个不同列中选择非空值来创建新列的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！