this might be a little tricky.

I understand on how to import csv data into mySQL, the problem arises in normalizing the data that is pulled from the csv...

in my clients CSV he has three columns: CAT, SUBCAT, GROUP

these have repitious data in them. what he wants to be able to do is export from his product program to a CSV. then go to his CMS on his website, upload the CSV and then be able to go to his website and browse by category and search through categories.

Am i going to notice a large slowdown if I don't normalize those fields.

If i do need to normalize them, how can i do this easily without too much trouble.

These 3 columns have many different categories and groups and change on a weekly basis.

thank you for any help someone can provide.