Use cases

• You have two or more files with data and you want to extract parts of it.
• You have a file with all your customers and a file with all your orders and you want to see what customers that has not made any orders.
• Someone sent you a file with all the customers that has made an order and you want to see what customers that are not in your system.
• Someone has sent you a file with all the members of a club and you want to see what members that has been added since last time.
• You have a file with all the members of a club and a file with all the members of a club and you want to see what members that are in both files.
• You have a file with all the members of a club and a file with all the members of a club and you want to see what members that are in one file but not in the other.
• You have a really big file and you want to see what rows that are unique in that file.
• You want to import data from a file to a sql database but only the new rows that has been added since last time.