title: Postgresql - remove any whitespace from sub string
body: <p>How can I remove any white space from substring of string?</p>
  
  <p>For example I have this number '+370 650 12345'. I need all numbers to have this format <code>country_code rest_of_the_number</code> or in that example: <code>+370 65012345</code>. How could you achieve that with PostgreSQL?</p>
  
  <p>I could use <code>trim()</code> function, but then it would remove all whitespace.</p>