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;