title: how does NOLOCK works
body: <p>I know the use of NOLOCK, but can someone please help me with the mechanism of NOLOCK.</p>
  
  <ol>
  <li>if a table is write-locked will no lock return values(during the write-lock).</li>
  </ol>
  
  <p>if yes then which state of data will it refer ?</p>