查看Oracle各种对象

--表: 
  select * from cat; 
  select * from tab; 
 select table_name from user_tables; 

--视图: 
 select text from user_views where view_name=upper('&view_name'); 
 
--索引: 
 select index_name,table_owner,table_name,tablespace_name,status from user_indexes order by table_name; 

--触发器: 
 select trigger_name,trigger_type,table_owner,table_name,status from user_triggers; 
 
--快照: 
 select owner,name,master,table_name,last_refresh,next from user_snapshots order by owner,next; 
 
--同义词: 
 select * from syn; 
 
--序列: 
 select * from seq; 
 
--数据库链路: 
 select * from user_db_links; 
 
--约束限制: 
 select TABLE_NAME,CONSTRAINT_NAME,SEARCH_CONDITION,STATUS from user_constraints; 
 
--本用户读取其他用户对象的权限: 
 select * from user_tab_privs; 
 
--本用户所拥有的系统权限: 
 select * from user_sys_privs; 
 
--用户: 
  select * from all_users order by user_id; 
  select username from dba_users;

--表空间剩余自由空间情况: 
  select tablespace_name,sum(bytes) 总字节数,max(bytes),count(*) from dba_free_space group by tablespace_name; 
 
--数据字典: 
 select table_name from dict order by table_name; 
 
--锁及资源信息: 
 select * from v$lock;不包括DDL锁 
 
--数据库字符集: 
 select name,value$ from props$ where name='NLS_CHARACTERSET'; 
 
--inin.ora参数: 
 select name,value from v$parameter order by name; 
 
--SQL共享池: 
 select sql_text from v$sqlarea; 
 
--数据库: 
 select * from v$database 
 
--控制文件: 
 select * from V$controlfile; 

--重做日志文件信息: 
 select * from V$logfile; 

--来自控制文件中的日志文件信息: 
 select * from V$log; 

--来自控制文件中的数据文件信息: 
 select * from V$datafile; 

--NLS参数当前值: 
 select * from V$nls_parameters; 
 
--ORACLE版本信息: 
 select * from v$version; 
 
--描述后台进程: 
 select * from v$bgprocess; 
 
--查看版本信息: 
 select * from product_component_version; 
 

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