mysql语句中/*!50001是什么意思?

最近在查看服务器导出的MySQL sql文件时发现如下代码：

/*!50001 CREATE VIEW `cxda_cheat_view` AS SELECT
1 AS `studentID`,
1 AS `name`,
1 AS `gender`,
1 AS `subject`,
1 AS `result`,
1 AS `detail`,
1 AS `grade`,
1 AS `politicalStatus`,
1 AS `IDNumber`,
1 AS `address`,
1 AS `remark`,
1 AS `time`,
1 AS `creator`,
1 AS `department`,
1 AS `major`,
1 AS `id`,
1 AS `dpid`*/;

在MySQL里，多行注释使用 /* */，这个是SQL的标准 ，那么MySQL语句中/*!50001是什么意思呢？

这是MySQL扩展的注释方法，这里的50001表示版本判断，如果MySQL数据库版本是5.00.01以上，该语句才会被执行，如果版本低于5.00.01，则语句被注释。