Hi I have a use case where i need to compare 2 data table and upda accordingly on the main datatable

Hi its related to this topic where it compare 2 data table then if the data didnt found in the datatable 2 it will then add a new row and add the data in data table1.

but the new thing is if it found any matching Phone Number and some of the column value is diffrent i want to update the rows in data table 1 according to the values of data in column 2, but keep in mind not all column will be updated