title: how to check start range, end range, date range covered by data
body: <p>i want to know how can i get the start date, end date and date range covered by data.</p>
  <pre><code>user_id gender  address store_id    trans_id    timestamp   item_id quantity    dollar
  0   101981  F   E   2860    818463  2000-11-01  4.710000e+12    1   37
  1   101981  F   E   2861    818464  2000-11-01  4.710000e+12    1   17
  2   101981  F   E   2862    818465  2000-11-01  4.710000e+12    1   23
  3   101981  F   E   2863    818466  2000-11-01  4.710000e+12    1   41
  4   101981  F   E   2864    818467  2000-11-01  4.710000e+12    8   288
  </code></pre>