-- sql update using string format
String = "UPDATE yourtable SET yourcolumn = '" + yourvealueintext + "' WHERE column = " + item_to_compare_the_position_of_Your_Column;
-- or
String = "UPDATE yourtable SET yourcolumn = " + yourvalue_in_number + " WHERE column = " + item_to_compare_the_position_of_Your_Column;