How can i maintain the two columns id and content also id?

How can i maintain the two columns id and content also id. The id column is there in the Id and inside content also id filed is there how can i maintain this…? In MongoDB _id column not create once again. But in the Couchbase server is it possible in the content. So Same column two time coming. So My DataTable record Showing time issue came.

Hi,

Could you give an example of what is the input and the expected outcome?