updating another table's column with presnt gridview's total

Greets everybody



i have a salary table like this

table1(gridview)

sl.no name salary

1 raj 1000

2 aman 1200

3 khan 900

4 jammy 1100

total 4200



and i have another table like this

table2
sl.no name total salary

1 total 0



how to update table2's column total salary with total of table 1