How to use list to select the row

Hi
I have values of customers in one table, and I am trying to do actions on another table, I need to use list as selecting option and once selected it should go to other table. Can anyone help me in this?

Thanks,

Can you explain more about what you want to do?

What have you done so far?

so I have a table where I need to add invoicing information, and another table where customers information is written, I am using other table as list to show customers and I want the customer list shall be selectable so that one clicks on required customer and it goes to customer column in that specific invoicing table.

You want a choice component to show a list a customer? Is that correct?