The maximum column value of all tables
<p>It's possible to add to below script max value of one specific column (each have this column with the same name):</p>

<pre><code>select 
  owner, 
  table_name, 
  round((num_rows*avg_row_len)/(1024*1024)) MB,
  num_rows "ROWS",
  last_analyzed
--max(data_for_each_column)
from all_tables 
where owner = 'OAP'
order by table_name asc
</code></pre>

<p><a href="https://i.stack.imgur.com/mKeEC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mKeEC.png" alt="Example"></a></p>