title: SQL Delete sentence in one string that exists in another
body: <p>I am using Microsoft SQL Server 2016.</p>
  <p>I have two strings containing email addresses called <code>@Recipients</code> and <code>@Copy_Recipients</code>.</p>
  <p>I need to <code>cut out</code> those emails from <code>@Copy_Recipients</code> that exists in <code>@Recipients</code>.</p>
  <pre><code>@Recipients = 'john_snow@com.eu;daenerys_stormborn@com.eu;tonny_hawk@com.eu';
  
  @Copy_Recipients = 'john_snow@com.eu;daenerys_stormborn@com.eu;tommy_leejones@com.eu;johny_cash@com.eu;';
  
  @Wanted_Result = 'tommy_leejones@com.eu;johny_cash@com.eu;';
  </code></pre>
  <p>I know I am not bringing any idea of how to fix this. That's why I am writing. To ask what methods or functions could I use to achieve my goal. Thank you.</p>