I would like to aggregate the data of multiple spreadsheets into one spreadsheet.
Duplicates shall not be handled differently. I would like them to appear as often as they appear in the different sheets.
Is it possible to do this without writing a script or using jQuery, e.g. by using IMPORTRANGE?
What does not work: I have tried using IMPORTRANGE as follows:
ARRAY{IMPORTRANGE("key-of-spreadsheet1","list!A2:A500"), IMPORTRANGE("key-of-spreadsheet2", "list!A2:A500")}
This causes an error.
You should be able to use a vertical array in the Spreadsheet 3:
={IMPORTRANGE("Sheet1Key","SheetName!A2:A500");IMPORTRANGE("Sheet2Key","SheetName!A2:A500")}