How to create a table with columns from other 4 tables(they don't have primary/foreign key relations)?
Create a table with an extra column to distinguish where it came from
Do something like


...

INSERT INTO new_table (title, price, items_ct, link, which)
    ( SELECT *, '10_05' AS which FROM csv_10_05 )
    UNION ALL
    ( SELECT *, '11_05' AS which FROM csv_11_05 )
    UNION ALL
    ...