Simple script to change value

Hello everyone!

I need  а script who change the  first column  of each row in table ( Master Account)!

     Its content 4753 (value)  and I need to change to 4797(value) !

      And because I have over 20,000 rows to change I need a script to do it ?!!?

   Attach and image with the table itself!



   Thanks for any help !