Expression Error: We cannot apply operator < to types Number and Duration

Hi, Anonymous 

You can try to solve this problem with calculated columns.

Column =
IF (
    [Vulnerability_Test_Date] - [Vulnerability_Published_Date] >= 35
        && [Severity] = "Critical",
    "Yes",
    IF (
        [Vulnerability_Test_Date] - [Vulnerability_Published_Date] >= 65
            && [Severity] = "High",
        "Yes",
        IF (
            [Vulnerability_Test_Date] - [Vulnerability_Published_Date] >= 95
                && [Severity] = "Medium",
            "Yes",
            "No"
        )
    )
)

If you try to solve it in Power query custom column, you need to do type conversion.

if (Number.From([Vulnerability_Test_Date] - [Vulnerability_Published_Date]) >=35) and [Severity] = "Critical" then "Yes" else
if (Number.From([Vulnerability_Test_Date] - [Vulnerability_Published_Date])>=65) and [Severity] = "High" then "Yes" else if
(Number.From([Vulnerability_Test_Date] - [Vulnerability_Published_Date])>=95) and [Severity] = "Medium" then "Yes" else "No"

This is the relevant document, hope to help you:

https://docs.microsoft.com/powerquery-m/type-conversion 

Best Regards,

Community Support Team _Charlotte

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