oracle创建用户，授权

用scott用户以sysdba的身份登录oracle
conn scott/tiger as sysdba;

创建用户
create user john identified by 123456;

修改用户的密码
alter user john identified by 654321;

查看所有用户所在的表空间
select username,default_tablespace from dba_users;

创建表空间
create tablespace ts_john datafile 'f:\john\john.dbf' size 200M;

将表空间分配给用户
alter user john default tablespace ts_john;

分配权限给用户
grant create session,create table,create view,create sequence,unlimited tablespace to john;

删除用户及其相关对象
drop user john cascade;