title: Find if a column in Oracle has a sequence
body: <p>I am attempting to figure out if a column in Oracle is populated from a sequence.  My impression of how Oracle handles sequencing is that the sequence and column are separate entities and one needs to either manually insert the next sequence value like:</p>
  
  <pre><code>insert into tbl1 values(someseq.nextval, 'test')
  </code></pre>
  
  <p>or put it into a table trigger.  Meaning that it is non-trivial to tell if a column is populated from a sequence.  Is that correct?  Any ideas about how I might go about figuring out if a column is populated from a sequence?</p>