title: Oracle disk space used by a table
body: <p>I have a table in an Oracle db that gets a couple of million new rows every month. Each row has a column which states the date when it was created. </p>
  
  <p>I'd like to run a query that gets the disk space growth over the last 6 months. In other words, the result would be a table with two columns where each row would have the month's name and disk space used during that month.</p>
  
  <p>Thanks,</p>