<h3>regexp_replace() function</h3>
Returns a string with the supplied regular expression replaced.

<p><h4>Syntax</h4>
     replace(<i>string,before,after</i>)</p>

<p><h4>Arguments</h4>
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<i>  string</i> &rarr; is string.  The start string.<br>
<i>  before</i> &rarr; is string.  The string to replace.<br>
<i>  after</i> &rarr; is string.  The string that will replace <i>before</i><br></p>

<p><h4>Example</h4>
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     replace('QGIS SHOULD ROCK','SHOULD','DOES') &rarr; 'QGIS DOES ROCK'</p>