update mysql from another source

[vanoosterhout]

I need to update a 3.23 mysql database table based on information from a third party.

I notice the 4.x versions of MySQL allows me to to do multi table updates based, but I do not have access to that version.

Is there any script can go through a text file and update a specific table fields based on the content of the text file or based on the content of another table?

Thanks,