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

Find everything you need to get certified on Fabric—skills challenges, live sessions, exam prep, role guidance, and more. Get started

Reply
Anonymous
Not applicable

Operators in Power Query M

Hi,

 

I can use the operators = and <> between two dates.  But I get an error when I use <, >, >= or <=.  I have both my fields are a Date data type.  

 

Expression.Error: We cannot apply operator < to types List and Date.
Details:
Operator=<
Left=[List]
Right=2021-05-31

 

 

1 ACCEPTED SOLUTION

 

Are you trying to apply this comparison across different tables? If you are then, yes, you will need to provide row context for the calculation for the remote table.

If you're making the comparison across two columns in the same table then the row context should be implicit, and there's another issue at play.

 

Pete



Now accepting Kudos! If my post helped you, why not give it a thumbs-up?

Proud to be a Datanaut!




View solution in original post

3 REPLIES 3
BA_Pete
Super User
Super User

Hi @Anonymous ,

 

Power Query quite clearly thinks that one of your dates is actually a list:

 

BA_Pete_0-1666793638103.png

 

You need to ensure that both columns only contain dates in every row.

 

Pete



Now accepting Kudos! If my post helped you, why not give it a thumbs-up?

Proud to be a Datanaut!




Anonymous
Not applicable

Every row only have dates.

I think I found my problem. Even if it's a table containing only one row, I still need to identify that row. Without identifying the row it reads it has a list.

Thanks

 

Are you trying to apply this comparison across different tables? If you are then, yes, you will need to provide row context for the calculation for the remote table.

If you're making the comparison across two columns in the same table then the row context should be implicit, and there's another issue at play.

 

Pete



Now accepting Kudos! If my post helped you, why not give it a thumbs-up?

Proud to be a Datanaut!




Helpful resources

Announcements
Europe Fabric Conference

Europe’s largest Microsoft Fabric Community Conference

Join the community in Stockholm for expert Microsoft Fabric learning including a very exciting keynote from Arun Ulag, Corporate Vice President, Azure Data.

Power BI Carousel June 2024

Power BI Monthly Update - June 2024

Check out the June 2024 Power BI update to learn about new features.

PBI_Carousel_NL_June

Fabric Community Update - June 2024

Get the latest Fabric updates from Build 2024, key Skills Challenge voucher deadlines, top blogs, forum posts, and product ideas.

RTI Forums Carousel3

New forum boards available in Real-Time Intelligence.

Ask questions in Eventhouse and KQL, Eventstream, and Reflex.

Top Solution Authors
Top Kudoed Authors