title: How to get the size of a varchar[n] field in one SQL statement?
body: <p>Suppose that I have a SQL table that has a varchar[1000] field called "Remarks".</p>
  
  <p>I would like to craft a single SQL statement, which when executed, will return 1000, or whatever the size of the varchar field might be changed to in the future.</p>
  
  <p>Something like <code>SELECT size(Remarks) FROM mytable</code>.</p>
  
  <p>How do I do this?</p>