11、查询oracle的连接数
2select count(*) from v$session;
32、查询oracle的并发连接数
4select count(*) from v$session where status='ACTIVE';
53、查看不同用户的连接数
6select username,count(username) from v$session where username is not null group by username;
74、查看所有用户:
8select * from all_users;
95、查看用户或角色系统权限(直接赋值给用户或角色的系统权限):
10select * from dba_sys_privs;
11select * from user_sys_privs;
126、查看角色(只能查看登陆用户拥有的角色)所包含的权限
13select * from role_sys_privs;
147、查看用户对象权限:
15select * from dba_tab_privs;
16select * from all_tab_privs;
17select * from user_tab_privs;
188、查看所有角色:
19select * from dba_roles;
209、查看用户或角色所拥有的角色:
21select * from dba_role_privs;
22select * from user_role_privs;
2310、查看哪些用户有sysdba或sysoper系统权限(查询时需要相应权限)
24select * from V$PWFILE_USERS;