I'm assuming you want the data for non QV use. Otherwise just keep the data in QVDs.
Does your DBMS have a utility that can load data from a CSV file (or write your own program)? If so, you can put the data into table boxes and export to a CSV file and load the DB from there. If every row does not have a unique key, generate one with rowno() when you load the QVD. Some row unique value is required in the table box to prevent QV from folding like values into a single row.