title: Dynamic or Static column?
body: <p>I have some tables in databases. The table contains more than 150 columns for some custom field operations which may/may not be used by all. Instead of creating static 150 unused column fields, it can be created dynamically using <code>add column</code>.</p>
  
  <p>Can somebody justify, which one is better? When to use dynamic, when static and why?</p>