title: Is a one column table good design?
body: <p>It it ok to have a table with just one column?  I know it isn't technically illegal, but is it considered poor design?</p>
  
  <p>EDIT:</p>
  
  <p>Here are a few examples:</p>
  
  <ul>
  <li>You have a table with the 50 valid US state codes, but you have no need to store the verbose state names.</li>
  <li>An email blacklist.</li>
  </ul>
  
  <p>Someone mentioned adding a key field. The way I see it, this single column WOULD be the primary key.</p>