Replace dates less than specific date to NULL

[macemit]

Hi,

My date column contains a range of dates. I need to replace dates prior to Jan 1, 2007 with null. I've got this:

= Table.ReplaceValue(#"Filtered Rows1",each [Mfg Date] < #date(2007, 1, 1),null,Replacer.ReplaceValue,{"Mfg Date"})

But no effect.  Help would be appreciated. Thanks.

[ChrisMendoza · Accepted solution]

@macemit - 

This seems to work in my small sample as a Custom Column:

if Date.Year([Date]) < 2007 then Replacer.ReplaceValue([Date],[Date],null) else [Date]

However I believe this is what you're looking for:

= Table.ReplaceValue(Source, each[Date], each if Date.Year(Date.From([Date])) < 2007 then null else [Date], Replacer.ReplaceValue, {"Date"})

You'll have to play with the Date.Year(Date.From([Date])) as I do not know what your current data type is.

I used this article - https://community.powerbi.com/t5/Desktop/Unable-to-use-Table-ReplaceValue-because-there-is-quot-quot...