I have a product price file of 45,000 lines ( called complete.xls), from which we have extracted about 3,000 lines to put on to our website(called website.xls)

I now want to put the whole price file (complete.xls) on the website, but do not want to duplicate what is already on there, the table with 3000 lines (website.xls)

Is there a way to remove the 3000 lines which are on website.xls from the complete.xls file

I am unable to upload this due to the size of the file and the sensitive nature of the prices etc. So hope this is still clear