title: geting maximu value in a table column
body: <p>I am trying to get maximum value of id column  </p>
  
  <pre><code>$taskid = (new Query())-&gt;select('MAX(id)')-&gt;from('member');
  
  echo $taskid;
  </code></pre>
  
  <p>unfortunate I got the below text</p>
  
  <pre><code>O:12:"yii\db\Query":20:{s:6:"select";a:1:{i:0;s:7:"MAX(id)";}s:12:"selectOption";N;s:8:"distinct";N;s:4:"from";a:1:{i:0;s:21:"member";}s:7:"groupBy";N;s:4:"join";N;s:6:"having";N;s:5:"union";N;s:6:"params";a:0:{}s:18:"queryCacheDuration";N;s:20:"queryCacheDependency";N;s:27:"yii\base\Component_events";a:0:{}s:35:"yii\base\Component_eventWildcards";a:0:{}s:30:"yii\base\Component_behaviors";N;s:5:"where";N;s:5:"limit";N;s:6:"offset";N;s:7:"orderBy";N;s:7:"indexBy";N;s:16:"emulateExecution";b:0;}
  </code></pre>
  
  <p>please help me out</p>