title: MySQL query to return all row with same value only if all of them with equal to diffrent value
body: <p>If have a db table name WORK with this data</p>
  
  <pre><code>Client|Task          |Status
  A     |Clean office  |Done
  A     |Paint the wall|Issue
  A     |Read mail     |Done
  B     |Fix PC        |Done
  B     |Buy Parts     |Done
  </code></pre>
  
  <p>My query is </p>
  
  <pre><code>SELECT * FROM `WORK` where Status = "Done"
  </code></pre>
  
  <p>I want to show only task that done, but if client have records that is not "Status = Done", I don't want to get neither of his records (Even those who have Status done)
  And I would get only two client B records because all of them done.</p>