输入起始snap后出错（snap是我任意写的），数据库是10.2.0.1.0
snap是怎么得到的呢？请帮忙谢谢。
Specify the Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap: 2
Begin Snapshot Id specified: 2
Enter value for end_snap: 5
End Snapshot Id specified: 5
declare
*
ERROR at line 1:
ORA-20200: Begin Snapshot Id 2 does not exist for this database/instance
ORA-06512: at line 28
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
还有就是创建statspack job后，每次想得到Report是不是要手动执行
@spreport才能得到该Report呀
