hi all ...In order to extract the field names of a table in one row separating it with comma I used awk and sed. But I need all the columns except the last 3 and I am not sure how to do that . I tried it in the awk part of the command as well as in the sed part. But I am failing to achieve the required result. Can somebody suggest what would be the best way to achieve this

Thanks

There is a paucity of info here, but