You could do this by accessing the database directly.
You will need to use some sort of MySQL GUI tool like PHPMyAdmin, Sequel Pro or Heidi SQL.
using the GUI Tool, you can access the data in the database directly and select the rows for the items to delete.
to insert multiple records you will need to have a solid understanding of the SQL language and the table structure, this is not something we can offer a lot of support for. you would need to create the SQL Insert statements for each product manually.