=QUERY( IMPORTRANGE( "https://URL", "Name Of Sheet!1:999" ), "SELECT * WHERE Col" & COLUMN(namedRange) & "'is not null",0 )
This spits out the error of:
Unable to parse query string for Function QUERY parameter 2: PARSE_ERROR: Encountered " <ID> "Col1 "" at line 1, column 16. Was expecting one of: "(" ... "(" ...
I know part of the solution is working with the "&" symbol to join certain blocks of quotes. The biggest challenge is putting the right quotation marks in the right spot.