title: SET instruction in SQL Server that doesn't work
body: <p>So I've tried making some math operations in SQL Server and the code returns multiple values. I'm used to writing IN when handling multiple operations. However, as there is no where, I can't use IN. What to use? </p>
  
  <pre><code>use bio
  
  update valori 
  set lsd  in (select(max(valori) - min(valori)) / max(valori) from valori join param on 
  valori.id_param=param.id_param
  group by valori.id_param);
  </code></pre>
  
  <p>PS: Sorry if the question is not clear.</p>