title: Oracle regex match whitespace
body: <p>I'm trying to change a value in oracle with regex:</p>
  
  <pre><code>input: &lt;input id="f_alta"&gt;13/10/2016  10:10:10&lt;/input&gt;
  output: 13/10/2016  10:10:10
  </code></pre>
  
  <p>well, to get inside the node I use: <strong>([\s0-9/:]+)</strong> but is no working, anyway I use: <strong>([ 0-9/:]+)</strong> and works, why is not working with the first one?</p>
  
  <p>I'm using oracle sql developer for tests.</p>
  
  <p>Example:</p>
  
  <p>NOT WORKING:</p>
  
  <pre><code>select REGEXP_REPLACE('&lt;input id="f_alta"&gt;13/10/2016  10:10:10&lt;/input&gt;', '&lt;input id="f_alta"&gt;([\s0-9/:]+)&lt;/input&gt;', '\1' ) from dual
  </code></pre>
  
  <p>WORKING: </p>
  
  <pre><code>select REGEXP_REPLACE('&lt;input id="f_alta"&gt;13/10/2016  10:10:10&lt;/input&gt;', '&lt;input id="f_alta"&gt;([ 0-9/:]+)&lt;/input&gt;', '\1' ) from dual
  </code></pre>