How to get rid of empty cells in an importrange and sort by person?

Question

I am importing data to display form multiple sheets. I'm able to get the data, but I want to eliminate any empty cells. How do I get rid of blank columns and sort by person name?

=Query({IMPORTRANGE("SHEET ID","January!A:Z");IMPORTRANGE("SHEET ID","February!A:Z");IMPORTRANGE("SHEET ID","March!A:Z");IMPORTRANGE("SHEET ID","April!A:Z");IMPORTRANGE("SHEET ID","May!A:Z");IMPORTRANGE("SHEET ID","June!A:Z");IMPORTRANGE("SHEET ID","June!A:Z");IMPORTRANGE("SHEET ID","July!A:Z");IMPORTRANGE("SHEET ID","August!A:Z");IMPORTRANGE("SHEET ID","September!A:Z");IMPORTRANGE("SHEET ID","October!A:Z");IMPORTRANGE("SHEET ID","November!A:Z");IMPORTRANGE("SHEET ID","December!A:Z")},"select Col3 * where Col3 <> " ") and Where Col2 = “Mike”

Answer 1

• for removing empty cells you need to add: is not null and choose a column.
• for sorting you need to add order by and choose a column.

example:

=QUERY({IMPORTRANGE("SHEET ID","January!A:Z");
        IMPORTRANGE("SHEET ID","February!A:Z");
        IMPORTRANGE("SHEET ID","March!A:Z");
        IMPORTRANGE("SHEET ID","April!A:Z");
        IMPORTRANGE("SHEET ID","May!A:Z");
        IMPORTRANGE("SHEET ID","June!A:Z");
        IMPORTRANGE("SHEET ID","June!A:Z");
        IMPORTRANGE("SHEET ID","July!A:Z");
        IMPORTRANGE("SHEET ID","August!A:Z");
        IMPORTRANGE("SHEET ID","September!A:Z");
        IMPORTRANGE("SHEET ID","October!A:Z");
        IMPORTRANGE("SHEET ID","November!A:Z");
        IMPORTRANGE("SHEET ID","December!A:Z")},
 "select * 
  where Col3 <> '' 
    and Col2 = 'Mike'
    and Col1 is not null
  order by Col4 desc")