1、以sys登陆，建表赋予权限，准备测试表z2
[oracle@crl ~]$ rlwrap sqlplus / as sysdba
sql*Plus: Release 11.2.0.4.0 Production on Tue May 16 14:59:27 2017
Copyright (c) 1982,2013,Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning,OLAP,Data Mining and Real Application Testing options
sql> create table z2 as select 1 as a from dual;
Table created.
sql> grant select on z2 to dwetl;
Grant succeeded.
sql>
2、以dwetl账号登陆，对表进行查询权限，查询OK，能访问数据
[oracle@crl ~]$ rlwrap sqlplus 'dwetl/"pwd2017"'@DB1
sql*Plus: Release 11.2.0.4.0 Production on Tue May 16 14:59:01 2017
Copyright (c) 1982,Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning,Data Mining and Real Application Testing options
sql> select * from sys.z2;
A
----------
1
sql>
3、再以sys登陆，删除表z2后，再次建立表z2
[oracle@crl ~]$ rlwrap sqlplus / as sysdba
sql*Plus: Release 11.2.0.4.0 Production on Tue May 16 14:59:27 2017
Copyright (c) 1982,Data Mining and Real Application Testing options
sql> drop table sys.z2;
Table dropped.
sql> create table z2 as select 1 as a from dual;
Table created.
sql>
sql> select * from sys.z2;
A
----------
1
sql>
4、再以dwetl登陆，看是否可以查询到，答案是查不到，报错表或者视图不存在
[oracle@crl ~]$ rlwrap sqlplus 'dwetl/"pwd2017"'@DB1
sql*Plus: Release 11.2.0.4.0 Production on Tue May 16 15:03:10 2017
Copyright (c) 1982,Data Mining and Real Application Testing options
sql> select * from sys.z2;
select * from sys.z2
*
ERROR at line 1:
ORA-00942: table or view does not exist
sql>
5，再次以sys登陆，赋予表z2给dwetl的权限
[oracle@crl ~]$ rlwrap sqlplus / as sysdba
sql*Plus: Release 11.2.0.4.0 Production on Tue May 16 15:14:16 2017
Copyright (c) 1982,Data Mining and Real Application Testing options
sql> grant select on z2 to dwetl;
Grant succeeded.
sql>
6，再次以dwetl登陆，尝试是否可以查询到sys.z2表，OK，可以查询到数据了
[oracle@crl ~]$ rlwrap sqlplus 'dwetl/"pwd2017"'@DB1
sql*Plus: Release 11.2.0.4.0 Production on Tue May 16 15:14:57 2017
Copyright (c) 1982,Data Mining and Real Application Testing options
sql> select * from sys.z2;
A
----------
1
sql>
7、truncate对权限有无影响？
以sys登陆，执行truncate操作表z2，然后退出，以dwetl登陆查询表z2，发现可以执行select操作
sql> truncate table z2;
Table truncated.
sql> exit
ERROR:
ORA-04088: error during execution of trigger 'TIMDBA.TRIG_logoFF_AUDIT'
ORA-01403: no data found
ORA-06512: at line 5
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning,Data Mining and Real Application Testing options (with complications)
[oracle@crl ~]$ rlwrap sqlplus 'dwetl/"pwd2017"'@DB1
sql*Plus: Release 11.2.0.4.0 Production on Tue May 16 15:18:08 2017
Copyright (c) 1982,Data Mining and Real Application Testing options
sql> select * from sys.z2;
no rows selected
sql>
以上测试实验结论标识： (1)：当表被drop掉后，别的用户对这个表的操作权限失效了，请记得重新grant下权限，不然另外的用户就无法对表进行操作； (2)：当表被truncate之后，别的用户对这张表的操作权限依然有效。
