How do I remove non date time values from Date Time columns

[smjzahid]

I have a column as DateTime which is connected to excel files and users have keyed in TEXT value in source excel file.

This will keep happening again and again, How do I write a logic in Power Query that converts all TEXT values entered in this column to null

[v-eqin-msft]

Hi @smjzahid ,

You could follow @AlexisOlson 's suggestion to use error handling function Try... Otherwise

Or add a replaced error step after changing type:

Best Regards,
Eyelyn Qin
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[AlexisOlson · Accepted solution]

Do a transformation step on your column and then tweak the code to look like this:

= Table.TransformColumns(Source, {{"Planned Finish Date & Time",
    each try DateTime.FromText(_) otherwise null, type datetime}})

Here's a full code sample you can paste into the Advanced Editor:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjIwMtI1MNQ1MA0xMLYyNrYyNNIzMjU3AAKlWJ1oJTARklpRohQbCwA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Planned Finish Date & Time" = _t]),
    #"Text to Nulls" = Table.TransformColumns(Source,{{"Planned Finish Date & Time", each try DateTime.FromText(_) otherwise null, type datetime}})
in
    #"Text to Nulls"