I have a dataset which has 1 table with 10 coloumns and n rows.

I create a new table "newTable" which contains 2 coloumns "A" and "B".

I want to copy the contents of col 7 and col 8 of the original dataset/table into "newTable".

Whats the most efficient way of doing this ?

Coming up with a refined way of doing this is important as I perform this operation often in my application.