title: Oracle 10g: column is blank, but is not null or an empty string
body: <p>I have a column in a table that is blank. The weird thing is that it does not appear to be null or an empty string. So, if I do this:</p>
  
  <pre><code>SELECT * 
    FROM TABLE 
   WHERE column IS NULL
  </code></pre>
  
  <p>...or:</p>
  
  <pre><code>SELECT * 
    FROM TABLE 
   WHERE column = ''
  </code></pre>
  
  <p>I get nothing. Thoughts?</p>