oracle之报错:ORA-00054: 资源正忙，要求指定 NOWAIT

问题如下：

SQL> conn scott/tiger@vm_database
Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.6.0
Connected as scott

。。。。。。

SQL> drop table student2;

drop table student2

ORA-00054: 资源正忙, 但指定以 NOWAIT 方式获取资源, 或者超时失效

http://www.cnblogs.com/loveLearning/p/3625544.html