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Sab's avatar
Sab
Helper V
1 year ago
Solved

UNION returns strange dates

Hello!   I am a table with around 400k rows (Sales), and another table with 15k (sales Current Month).    As you can see from the screenshot, the dates are normal in the first two tables, and whe...
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  • Sab's avatar
    Sab
    1 year ago

    thank you for your replies, I found the 'issue'!

     

    It was a column which for whatever reason was misplaced compared to the same column in the other table. 

     

    In Power Query they were properly ordered, but after loading one of them went off one position! I tried to reorder that column in Power Query by sending it to the beginning (in both tables), didn't work! I had to get rid of it and after that, the dates look fine. 


    Thanks again for your replies!

Ritaf1983's avatar
Ritaf1983
Super User
1 year ago

Hi Sab 

I tested a similar setup on my end, and the UNION function worked correctly without any date issues. If you're still experiencing strange dates, I recommend checking the data types of both columns in Power Query to ensure they’re explicitly set as Date/Time. Sometimes, mismatches in data types can cause unexpected results in DAX functions.

If everything seems correct with the data types and the issue persists, try refreshing the query or clearing any applied transformations that might impact the date format.

 

The pbix with the test is attached

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