Filling null cells from a different column

[aharris15]

I'm new to Power Query and PowerBI and feel like this should be relatively simple but I haen't figured it out quite yet.

I have an incomplete column of data that has some null cells. I want to fill the null cells in Column A with the values in Column B, but only the null cells. If the cells in Column A have a value, I want to keep those values. And furthermore, if Column B happens to be null as well, how do you get it to get the value from Column C?

Update: I've tried setting up a conditional column as shown below but I don't think its recognizing the null values because it just returns the column I have setup in the Else condition and I still have the nulls.

[gpoggi]

Hi aharris15, your conditional column setup seems to be ok, and other way to get the Columns C value when Column B is null is creating a Custom Column with this code:

if

  [Column A] = null

then

  if

    [Column B] = null

  then

    [Column C]

  else

    [Column B]

else

  [Column A]

This should work, but one question regarding your conditional column, it should work as it is, so maybe the problem is about your nulls, did you confirm that Column A contains nulls instead of (blank) values? if you did, Could you send a sample of your data so we can help you to figure it out what is going on?

Regards,

Gian Carlo Poggi

[aharris15]

So my cells are actually blank - they do not have null in them. I tried putting " " instead of null but still no luck. Is there something else I need to put there instead?

[gpoggi · Accepted solution]

Yep, you are using space " " and blank doesn't have spaces, so try to compare to nothing between quotes "" it should work.

Any question, just let me know.

Regards,

Gian Carlo Poggi

[aharris15]

I was able to get that to work. Thank you!