oracle 字典表查询

1.oracle 字典表查询

 /*显示当前用户*/
show user
在sql plus中可用，在pl sql中不可用

/*查看所有用户名*/　
select username,user_id,created from all_users;

/*查看当前用户的用户详情*/　
select username,user_id,account_status,lock_date,expiry_date,default_tablespace,temporary_tablespace,created,initial_rsrc_consumer_group,external_name from user_users;

/*查看数据库的版本*/　
select product,version,status from product_component_version;

/*查看当前用户的用户权限，系统权限和表级权限*/　
select username,granted_role,admin_option,default_role,os_granted from user_role_privs;
select username,privilege,admin_option from user_sys_privs;
select grantee,owner,table_name,grantor,priviege,granttable,hierarchy from user_tab_privs;

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;
 
　　查看用户下所有的表
SQL>select * from user_tables;
 
　　显示用户信息(所属表空间)
select default_tablespace,temporary_tablespace 
from dba_users where username='GAME';
 
　　1、用户
 
　　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');
 
 
 查看表与主键的关系:
 select b.table_name, column_name from 
(select table_name, constraint_name from user_constraints where constraint_type = 'P') a, 
user_cons_columns b
 where a.constraint_name = b.constraint_name
   and a.table_name = b.table_name
 order by b.position;