title: Create Column Allow NULL but Default Value Set to NOT NULL
body: <p>Id like to create a column on my table that allows null but is set by default to empty (not <code>null</code>)</p>
  
  <pre><code>ALTER TABLE {TABLENAME} 
  ADD {COLUMNNAME} {TYPE} DEFAULT '';
  </code></pre>
  
  <p>This doesn't seem to work. Any ideas?</p>
  
  <p>Thanks!</p>