How to get direct access to specific record in file with SQLite? in LibGDX

I am programming Android using LibGDX.

I have big file and want to sraightforward access specific line on the file without going through all the lines and iterating them until i reach desired line.

I was suggested to use SQLite for this.

So I followed example and did this:

DatabaseCursor cursor;
cursor = mydb1.rawQuery("SELECT * FROM comments");
 while (cursor.next()) {
            cursor.getString(1);
        }

Well it works , but that is iteration (looping)! how to do it directly? thanx