Oracle常用数据字典的查询使用方法

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');