Array
(
    [0] => id
    [1] => uname
    [2] => student_id
    [3] => cname
    [4] => dept
    [5] => batch
    [6] => regno
    [7] => level
    [8] => subname
    [9] => unitname
    [10] => topic
    [11] => questionid
    [12] => code_snippet
    [13] => start_time
    [14] => end_time
    [15] => total_time_seconds
    [16] => marks
    [17] => solved_date
    [18] => created_at
)