MarkLogic - Query to find out a sample Document from MarkLogic database to understand the structure of the data. There are two ways to fetch a sample data.

1st way -
Query: fn:doc()[n]
Syntax - fn:doc()[nth number document that you want to fetch]
Explanation - fn is a namespace and doc() is a marklogic function which
comes within fn namespace.
2nd way -
Query: (/RootNode)[n]
we can fetch a sample data with this way only when we know the root tag/parent tag of the XML(which is in the database).
Syntax - (/rootnode)[nth number document that you want to fetch]
Explanation - Its totally Marklogic supported Xpath.