title: What is the value of a valid empty blob on mysql?
body: <p>Let's just say you want to insert or update a row on table named <strong>table_a</strong>.</p>
  
  <p><strong>table_a</strong> has a <em>blob</em> column named <strong>column_a</strong>. In <strong>column_a</strong> you just want to insert a valid and minimal empty value by deliberately passing a value.</p>
  
  <p>Is that possible in MySQL? If so, what is the value of a valid empty blob?</p>