标签:order arch 用户 data next table rac username role
--序列查询
SELECT 序列名.CURRVAL FROM dual;
SELECT 序列名.NEXTVAL FROM DUAL;
--查询表字段
SELECT column_name FROM user_tab_columns where table_name = upper(‘表名‘);
--修改字段长度
alter table tablename modify RULE_BIZ_TYPE varchar2(16);
--查看用户和默认表空间的关系
select username,default_tablespace from dba_users;
--查看当前用户能访问的表
select * from user_tables;
--Oracle查询用户表
select * from user_all_tables;
--Oracle查询用户视图
select * from user_views;
--查询所有函数和储存过程:
select * from user_source;
--查询所有用户:
select * from all_users;
--select * from dba_users
--查看当前用户连接:
select * from v$Session;
--查看用户角色
SELECT * FROM USER_ROLE_PRIVS;
--查看当前用户权限:
select * from session_privs;
--查看所有用户所拥有的角色
SELECT * FROM DBA_ROLE_PRIVS;
--查看所有角色
select * from dba_roles;
--查看数据库名
SELECT NAME FROM V$DATABASE;
--查看所有表空间使用情况
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;
标签:order arch 用户 data next table rac username role
原文地址:https://www.cnblogs.com/sonofsea/p/14821496.html