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Operator < can not be applied to Date & DateTime



I get an error message when trying to use the Table.SelectRows function to get data for the last 365 days only. I have tried it in PowerQuery Excel first and it works fine. In PowerBi Desktop however I get an error message saying the operator < can not be applied to types Date and DateTime. My [Date1] column is DateTime. I use the DateTime.LocalNow function to get the current date. To get the current date - 365 days, I use the Date.AddYear function. I am afraid that this function converts DateTime to Date and thus causing the error. Is this correct ? And if so, how can I solve this? There don't seem to be DateTime functions to calculate dates. Thanks in advance.





Community Champion
Community Champion

Your Date1 column is of type datetime, which is the default for Excel date fields that are imported in Power Query.

The solution is to adjust your #"ChangedType" code and make sure Date1 is changed to date instead of datetime.


Date.AddYears doesn't convert datetime to date, but year a feeding Date.AddYears with a date from one of the DateTime functions that return dates: DateTime.Date.


You can use Date.AddYears for dates, datetimes and datetimezones; it will return the same data type as the data type of the input.

Specializing in Power Query Formula Language (M)

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