title: check whether an array values a subset of a query?
body: <p>I've a set of rows </p>
  
  <p>SELECT id from Users WHERE...</p>
  
  <pre><code>1
  2
  6
  8
  9
  </code></pre>
  
  <p>and I've and <strong>array</strong> with values <code>2,3,6</code></p>
  
  <p>How can I check in <strong>SQL</strong> that the array is a sub set of the result of the query?</p>