If function or switch function to replace value

[MichelleQLi]

I have a table looking like below screenshot. 

I am not that familiar with Power BI DAX syntax, May I get some help to achieve below outcome:

A new colume to have:

if column 1 equals to "I"

and if Table3.Column6  not null

then use Table3.Column6 value to replace Column6 value

else remain Column6 value

[danextian · Accepted solution]

Hi @MichelleQLi ,

For simple conditional columns you can use the Add Conditional Column feature in the Query Editor. By the way, this editor uses M as the language. DAX is used once you've loaded your data into the model.

https://turbofuture.com/computers/A-Comparison-Between-M-Language-and-DAX-in-Power-BI 

[v-tangjie-msft · Accepted solution]

Hi @MichelleQLi ,

According to your description, here are my steps you can follow as a solution.

(1) This is my test data.  

(2) We can create a calculated column.

Column = IF('Table'[Column1]=="I" && 'Table'[Table3.Column6]<>BLANK(),'Table'[Table3.Column6],'Table'[Column6])

(3) Then the result is as follows.

Best Regards,

Neeko Tang

If this post  helps, then please consider Accept it as the solution  to help the other members find it more quickly. 

[danextian · Accepted solution]

Hi @MichelleQLi ,

For simple conditional columns you can use the Add Conditional Column feature in the Query Editor. By the way, this editor uses M as the language. DAX is used once you've loaded your data into the model.

https://turbofuture.com/computers/A-Comparison-Between-M-Language-and-DAX-in-Power-BI