如何在SQL中插入每日CSV文件，仅包括新闻行

Question

I have a CSV file with sales on the server which implements news rows every days. In this CSV file there is no primary key because the id of each line can be duplicated if there are several products for the same sale. Do you have any idea of how can I insert each days only the new rows after? I mean, the first insertion with all the rows, then each days only the news rows.