title: check if a column contains ALL the values of another column - Mysql
body: <p>Let's suppose I have a table T1 with people IDs and other stuff IDs, as the following</p>
  
  <pre><code>Table: T1
  personID | stuffID 
      1    |    1
      1    |    2
      1    |    3
      1    |    4
      2    |    1
      2    |    4
      3    |    1
      3    |    2
  </code></pre>
  
  <p>And another table T2 with just one column of stuffIDs</p>
  
  <pre><code>Table: T2
  stuffID
     1  
     2  
     3  
  </code></pre>
  
  <p>The result that I would get, by a <code>SELECT</code>, is a table of peopleIDs who are connected with ALL the stuffIDs of T2.</p>
  
  <p>Following the example the result would be only the id 1 (the personID 3 has no to appear even if all the stuffIDs it is associated are included in T2.stuffID).</p>