I'm really not sure how to attack this problem.
I have a users table:
id nombre dato
1 juan 1a
2 pedro 2b
3 paco 3c
An Excel document with the name document :
A
1 01a
2 02b
3 03c
My intention is that through a PHP button (or another way) I can Update the data column of the users table , the truth is that I find something lost in this case