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

Join us at FabCon Atlanta from March 16 - 20, 2026, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM. Register now.

Reply
Anonymous
Not applicable

Power Query Max.List error help

pq091018.JPG

Looking for help with this error. 

 

= Table.AddColumn(#"Filtered Rows", "Null Value ID", each if[XPO.ID]=null then List.Max([PI])+1 else[XPO. ID])

 

PI is a list of customer ID's.  They are formatted as numbers.  I want to return the max from that list +1 to create a unique number if there is no match to the list.  What am I missing?

 

Thanks,

Brian

1 ACCEPTED SOLUTION
Anonymous
Not applicable

Hi @Anonymous,

 

You can use below formula to fix this issue:

= Table.AddColumn(#"Filtered Rows", "Null Value ID", each if[XPO.ID]=null then List.Max(#"Filtered Rows"[PI])+1 else[XPO. ID])

 

Notice: when you use each keyword with column name, it not mean value list of specific column, it will transform to detail cell value of that column.

 

Regards,

Xiaoxin Sheng

View solution in original post

2 REPLIES 2
Anonymous
Not applicable

Hi @Anonymous,

 

You can use below formula to fix this issue:

= Table.AddColumn(#"Filtered Rows", "Null Value ID", each if[XPO.ID]=null then List.Max(#"Filtered Rows"[PI])+1 else[XPO. ID])

 

Notice: when you use each keyword with column name, it not mean value list of specific column, it will transform to detail cell value of that column.

 

Regards,

Xiaoxin Sheng

Anonymous
Not applicable

Thanks, Xiaoxin!  I knew it would be some small snytax issue.

Helpful resources

Announcements
Fabric Data Days Carousel

Fabric Data Days

Advance your Data & AI career with 50 days of live learning, contests, hands-on challenges, study groups & certifications and more!

October Power BI Update Carousel

Power BI Monthly Update - October 2025

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

FabCon Atlanta 2026 carousel

FabCon Atlanta 2026

Join us at FabCon Atlanta, March 16-20, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.