title: Delete Only First Zero in Column
body: <p>ch.value values 00 , 01 , 02 , 03.
  It must be 0 , 1 , 2 , 3.
  I'am using this code :</p>
  <pre><code>Concat_ws('_', ch.prop, Trim(LEADING '0' FROM ch.value))
  </code></pre>
  <p>This code does not work at 00 case , how can i fix it ?</p>