title: SUM character in MYSQL
body: <p>Is it possible to use <code>SUM(FIND_IN_SET("f",ftype)).</code></p>
  
  <p>Note: type is a varchar type in MYSQL table column.And the possible value are <strong>'f', 'v', 'g'.</strong></p>
  
  <p>I want to count the total value of f in a column.</p>