title: How to insert blank value instead of NULL mysql
body: <p>I want mysql to store blank value into a field, if a <code>NULL</code> value occurs into the record. </p>
  
  <p>How to set a default field value as an empty string or blank value instead of <code>NULL</code>.</p>
  
  <p>For example I want <code>" "</code> instead of <code>NULL</code>.</p>