ORACLE常用数据字典的查询视图

  1、用户
  
  查看用户下所有的表
  SQL>select * from user_tables;

  查看当前用户的缺省表空间
  SQL>select username,default_tablespace from user_users;

  查看当前用户的角色
  SQL>select * from user_role_privs;

  查看当前用户的系统权限和表级权限
  SQL>select * from user_sys_privs;
  SQL>select * from user_tab_privs;

  显示当前会话所具有的权限
  SQL>select * from session_privs;

  显示指定用户所具有的系统权限
  SQL>select * from dba_sys_privs where grantee='GAME';

  显示特权用户
  select * from v$pwfile_users;

  显示用户信息(所属表空间)
  select default_tablespace,temporary_tablespace 
  from dba_users where username='GAME';

  显示用户的PROFILE
  select profile from dba_users where username='GAME';

  
  2、表

  查看用户下所有的表
  SQL>select * from user_tables;

  查看名称包含log字符的表
  SQL>select object_name,object_id from user_objects
  where instr(object_name,'LOG')>0;

  查看某表的创建时间
  SQL>select object_name,created from user_objects where object_name=upper('&table_name');

  查看某表的大小
  SQL>select sum(bytes)/(1024*1024) as "size(M)" from user_segments
  where segment_name=upper('&table_name');

  查看放在ORACLE的内存区里的表
  SQL>select table_name,cache from user_tables where instr(cache,'Y')>0;

  3、索引

  查看索引个数和类别
  SQL>select index_name,index_type,table_name from user_indexes order by table_name;

  查看索引被索引的字段
  SQL>select * from user_ind_columns where index_name=upper('&index_name');

  查看索引的大小
  SQL>select sum(bytes)/(1024*1024) as "size(M)" from user_segments
  where segment_name=upper('&index_name');

  4、序列号

  查看序列号，last_number是当前值
  SQL>select * from user_sequences;

  5、视图

  查看视图的名称
  SQL>select view_name from user_views;

  查看创建视图的select语句
  SQL>set view_name,text_length from user_views;
  SQL>set long 2000; 说明：可以根据视图的text_length值设定set long 的大小
  SQL>select text from user_views where view_name=upper('&view_name');

  6、同义词

  查看同义词的名称
  SQL>select * from user_synonyms;

  7、约束条件

  查看某表的约束条件
  SQL>select constraint_name, constraint_type,search_condition, r_constraint_name
  from user_constraints where table_name = upper('&table_name');

  SQL>select c.constraint_name,c.constraint_type,cc.column_name
  from user_constraints c,user_cons_columns cc
  where c.owner = upper('&table_owner') and c.table_name = upper('&table_name')
  and c.owner = cc.owner and c.constraint_name = cc.constraint_name
  order by cc.position;

  8、存储函数和过程

  查看函数和过程的状态
  SQL>select object_name,status from user_objects where object_type='FUNCTION';
  SQL>select object_name,status from user_objects where object_type='PROCEDURE';

  查看函数和过程的源代码
  SQL>select text from all_source where owner=user and name=upper('&plsql_name'); 

 

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