Hi
Am implementing a insert update logic using lookup for a table (say having col1,Col2,col3,col4,col5,col6)while updating if null values are coming in for a set of columns (say col1 and col2) i shoult not over write existing value in those column but have to update remaining columns(col3,col4,col5,col6).
other case is if value is coming for col1 and col2 then update all columns how do i achive it?
the tables am working are huge tables