update doc

sc.html

@@ -411,6 +411,8 @@ Affect(row-cnt:1) cost in 19 ms.</pre></div>
   });
 </script>
 
+<script type="text/javascript" src="https://s4.cnzz.com/z_stat.php?id=1279151497&web_id=1279151497"></script>
+
 <script>
   var _hmt = _hmt || [];
   (function() {