Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Preparing for a certification exam? Ask exam experts all your questions on May 15th. Register now.

Reply
left4pie2
Helper I
Helper I

Add prefix to column based on another column

left4pie2_1-1646165516951.png

I'm trying to break this data up into two columns that I can subtract from each other. So for example I'd like to change 1950/ 50 to 1950 - 1950 = 0

The problem is sometimes the number on the right of the / only has two digets. So for example 1940/60 should be 1940/1960. 

 

left4pie2_3-1646165548742.png

left4pie2_2-1646165530710.png

I first seperated the number into two columns based on the / using split column button.

 

Next I'd like to create some logic that says if there are less than 4 characters in Face1.2, append the left two characters from Face1.1 to Face1.2. I'm having trouble doing this. I tried using the prefix option to do this and changed the face to LEFT([Face1.1],2) but I got an error.

left4pie2_4-1646165896566.png

 

Thanks for the help!

 

1 ACCEPTED SOLUTION
Daryl-Lynch-Bzy
Resident Rockstar
Resident Rockstar

HIi @left4pie2 , the following can be used in the Face.1.2 column in the transformcolumns function.

 

Table.TransformColumns(#"Previous Step", [Face.1.2] , each if Text.Length(_) = 2 then "19" & _ else _ )

 In the next step, you can convert both text columns to Numbers.

 

 

View solution in original post

2 REPLIES 2
Daryl-Lynch-Bzy
Resident Rockstar
Resident Rockstar

HIi @left4pie2 , the following can be used in the Face.1.2 column in the transformcolumns function.

 

Table.TransformColumns(#"Previous Step", [Face.1.2] , each if Text.Length(_) = 2 then "19" & _ else _ )

 In the next step, you can convert both text columns to Numbers.

 

 

That worked, thanks!

Helpful resources

Announcements
PBIApril_Carousel

Power BI Monthly Update - April 2025

Check out the April 2025 Power BI update to learn about new features.

Notebook Gallery Carousel1

NEW! Community Notebooks Gallery

Explore and share Fabric Notebooks to boost Power BI insights in the new community notebooks gallery.

April2025 Carousel

Fabric Community Update - April 2025

Find out what's new and trending in the Fabric community.