I presume you have phpMyAdmin? Most hosts provide this.
That makes it easy to import a file to add to, or to over-write, a table (you must make a copy of the table first for security - and you can also do that easily with phpMyAdmin.
The program is fairly clear about what to do, and really quite easy to use, if you have patience to read the screen and take care to get it right.
You must ensure that the table fields are identical to the Viart Table so preparation is important. When you have done it once you will probably set up a routine to do this.
I am definitely not a programmer and I quickly learned how to do this so I am sure you can
Regards
Chris