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pl456's avatar
pl456
Regular Visitor
6 years ago
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Copying a table change the datatype

Hi, I've found a weird behavior in PBI Desktop : If I create a new table from scratch with a date column like so : And I copy this table using DAX : The newly created table will ha...
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  • MartynRamsden's avatar
    MartynRamsden
    6 years ago

    Hi pl456 

     

    This isn't a bug but a difference in how dates are handled between DAX and Power BI.

    DAX only has the DateTime data type to handle dates. In Power BI, there are two additional data type: Date and Time.

    See here for more info: dax.guide/dt/datetime/ 

     

    Because you're using DAX to create your new table, the data type is forced to DateTime.

     

    Once you've created your new table, you can simply change the data type of the column using the UI in Power BI.

     

    Hope this helps.

     

    Best regards,
    Martyn


    If I answered your question, please help others by accepting it as a solution.

MartynRamsden's avatar
MartynRamsden
Icon for Solution Sage rankSolution Sage
6 years ago

Hi pl456 

 

This isn't a bug but a difference in how dates are handled between DAX and Power BI.

DAX only has the DateTime data type to handle dates. In Power BI, there are two additional data type: Date and Time.

See here for more info: dax.guide/dt/datetime/ 

 

Because you're using DAX to create your new table, the data type is forced to DateTime.

 

Once you've created your new table, you can simply change the data type of the column using the UI in Power BI.

 

Hope this helps.

 

Best regards,
Martyn


If I answered your question, please help others by accepting it as a solution.

  • pl456's avatar
    pl456
    Regular Visitor
    6 years ago

    That makes a lot of sense. Thanks for the explanation.