ORALCE数据字典查询方法
- 用户相关信息查询
查看当前用户的缺省表空间
select username,default_tablespace from user_users;
查看当前用户的角色
select * from user_role_privs;
查看当前用户的系统权限和表级权限
select * from user_sys_privs;
select * from user_tab_privs;
select * from user_tab_privs;
查看用户下所有的表
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';
显示用户的PROFILE
select profile from dba_users where username='GAME';
2、表信息查询
查看用户下所有的表
select profile from dba_users where username='GAME';
查看名称包含log字符的表
select object_name,object_id from user_objects
where instr(object_name,'LOG')>0;
where instr(object_name,'LOG')>0;
查看某表的创建时间
select object_name,created from user_objects where object_name=upper('&table_name');
查看某表的大小
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
select table_name,cache from user_tables where instr(cache,'Y')>0;
3、索引信息查询
查看索引个数和类别
select index_name,index_type,table_name from user_indexes order by table_name;
查看索引被索引的字段
select * from user_ind_columns where index_name=upper('&index_name');
查看索引的大小
select sum(bytes)/(1024*1024) as "size(M)" from user_segments
where segment_name=upper('&index_name');
where segment_name=upper('&index_name');
4、序列号信息查询(Sequences)
查看序列号,last_number是当前值
select * from user_sequences;
5、视图信息查询
查看视图的名称
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');
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、同义词信息查询
查看同义词的名称
SQL>select * from user_synonyms;
查看全局同义词
select * from all_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;
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;