oracle 查看 用户,用户权限,用户表空间,用户默认表空间
1.查看用户和默认表空间的关系。
select username,default_tablespace from dba_users;
2.查看当前用户的表:
select table_name from user_tables;
3.查看所有用户的表名:
select table_name from all_tables;
4.查看所有表名(其中包括系统表)
select table_name from all_tables;
5.查看所有的表:
select * from tab/dba_tables/dba_objects/cat;
下面介绍Oracle查询用户表空间
◆Oracle查询用户表空间:select * from user_all_tables
◆Oracle查询所有函数和储存过程:select * from user_source
◆Oracle查询所有用户:select * from all_users.select * from dba_users
◆Oracle查看当前用户连接:select * from v$Session
◆Oracle查看当前用户权限:select * from session_privs
◆Oracle查看用户表空间使用情况:
1.select a.file_id "FileNo",a.tablespace_name "Tablespace_name", a.bytes "Bytes",a.bytes-sum(nvl(b.bytes,0)) "Used", sum(nvl(b.bytes,0)) "Free", sum(nvl(b.bytes,0))/a.bytes*100 "%free" from dba_data_files a, dba_free_space b where a.file_id=b.file_id(+) group by a.tablespace_name , a.file_id,a.bytes order by a.tablespace_name;
1.查看所有用户:
select * from dba_user;
select * from all_users;
select * from user_users;
2.查看用户系统权限:
select * from dba_sys_privs;
select * from all_sys_privs;
select * from user_sys_privs;
3.查看用户对象权限:
select * from dba_tab_privs;
select * from all_tab_privs;
select * from user_tab_privs;
4.查看所有角色:
select * from dba_roles;
5.查看用户所拥有的角色:
select * from dba_role_privs;
select * from user_role_privs;
6.查看角色所拥有的权限:
select * from role_sys_privs;
select * from role_tab_privs;
7.查看所有系统权限
select * from system_privilege_map;
8.查看所有对象权限
select * from table_privilege_map;
以上是在Oracle中查看用户权限 ,在DB2中为:
select * from syscat.dbauth
或者
get authorizations
查看sid
select * from v$instance
获取表:
select table_name from user_tables; // 当前用户的表
select table_name from all_tables; // 所有用户的表
select table_name from dba_tables; // 包括系统表
select table_name from dba_tables where owner=' 用户名 '
user_tables :
table_name, tablespace_name, last_analyzed 等
dba_tables :
ower,table_name,tablespace_name,last_analyzed 等
all_tables :
ower, table_name, tablespace_name, last_analyzed 等
all_objects :
ower, object_name, subobject_name, object_id, created, last_ddl_time, timestamp, status 等
获取表字段:
select * from user_tab_columns where Table_Name='用户表';
select * from all_tab_columns where Table_Name='用户表';
select * from dba_tab_columns where Table_Name='用户表';
user_tab_columns :
table_name, column_name, data_type, data_length, data_precision, data_scale, nullable, column_id 等
all_tab_columns :
ower, table_name, column_name, data_type, data_length, data_precision, data_scale, nullable, column_id 等
dba_tab_columns :
ower, table_name, column_name, data_type, data_length, data_precision, data_scale, nullable, column_id 等
获取表注释:
select * from user_tab_comments;
user_tab_comments : table_name, table_type, comments
-- 相应的还有 dba_tab_comments, all_tab_comments,这两个比 user_tab_comments 多了 ower 列。
获取字段注释:
select * from user_col_comments;
user_col_comments : table_name, column_name, comments