title: what 'N' denotes here?
body: <p>When we write a query in sql for taking backup on a perticular location then we have to use query like this</p>
  
  <pre><code>BACKUP DATABASE [SQLAuthority]
  TO DISK = N'D:\SQLAuthority.bak'
  </code></pre>
  
  <p>I want to know that what is the actual mean of 'N' (after = sign) here.</p>
  
  <p>One more thing If I dont use the 'N' then backup will be done or not.</p>
  
  <p>Can any one explain this</p>