What has been tried so far :
=query(dataset, "select Col1 where Col1='"&left(C1,3)&"' and Col2 is not null")
What I am trying to do :
=query(dataset, "select "&left(&"Col1"&,3)&" where Col1='"&left(C1,3)&"' and Col2 is not null")
I am trying to find display only first 3 letters of returned Column. I might want to use other formulas too. Is it a possibility in Google Sheets Query?