title: how to fix oracle ORA-01722 invalid number error
body: <p>I have Oracle db with these inputs on column1(NUMBER(22,6)) in myTable. </p>
  
  <pre><code>0
  199935,15
  1026299
  </code></pre>
  
  <p>I want to display these columns like that:           </p>
  
  <pre><code>00000000000000000.000000
  00000000000199935.150000
  00000000001026299.000000
  </code></pre>
  
  <p>My query:</p>
  
  <pre><code>SELECT trim(to_char(trim(replace(column1,',','.')),'9999999999999990.999999')) 
  FROM myTable;
  </code></pre>
  
  <p>But Oracle shows this error. How can I fix?</p>
  
  <pre><code>01722. 00000 -  "invalid number"
  *Cause:    The specified number was invalid.
  *Action:   Specify a valid number.
  </code></pre>