一次Oracle建库记录
1.使用telnet登录10.149.187.18，用户名为root，密码为root&admin。
2.输入su - Oracle.
3.输入Sqlplus，输入用户名system和密码oracle。
4.使用以下语句删除原有表空间：
drop tablespace td including contents and datafiles;
drop tablespace shenggongsi including contents and datafiles;
drop tablespace tongfu including contents and datafiles;
drop tablespace tietong including contents and datafiles;
5.使用一下语句删除原有用户:
drop user td cascade;
drop user shenggongsi cascade;
drop user tongfu cascade;
drop user tietong cascade;
6.使用exit命令退出sqlplus。
7.使用su - root切换到root用户，输入密码root&admin。
8.使用df -g命令查看各目录的空间情况，确定/data01下是适合安装表空间文件的地方。
9.输入su - oracle切换到oracle用户.使用cd /data0进入/data0目录，使用mkdir dbffiles创建dbffiles子目录。
10.确定安装以下用户及其表空间：
User TableSpace
------------------------------------
sgs ts_sgs
tietong ts_tietong
tongfu ts_tongfu
td ts_td
确定表空间的初始大小是20G，自动增长，无最大限制。
11.输入su - oracle.
12.输入Sqlplus，输入用户名system和密码oracle。
13.使用以下语句创建表空间及用户：
CREATE TABLESPACE ts_sgs DATAFILE '/data01/dbffiles/ts_sgs.dbf' SIZE 20000m AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED;
CREATE user sgs identified by "123" default tablespace ts_sgs temporary tablespace TEMP profile DEFAULT;
alter user sgs identified by "123456";
grant dba to sgs with admin option;
CREATE TABLESPACE ts_tietong DATAFILE '/data01/dbffiles/ts_tietong.dbf' SIZE 20000m AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED;
CREATE user tietong identified by "123" default tablespace ts_tietong temporary tablespace TEMP profile DEFAULT;
alter user tietong identified by "123456";
grant dba to tietong with admin option;
CREATE TABLESPACE ts_tongfu DATAFILE '/data01/dbffiles/ts_tongfu.dbf' SIZE 20000m AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED;
CREATE user tongfu identified by "123" default tablespace ts_tongfu temporary tablespace TEMP profile DEFAULT;
alter user tongfu identified by "123456";
grant dba to tongfu with admin option;
CREATE TABLESPACE ts_td DATAFILE '/data01/dbffiles/ts_td.dbf' SIZE 20000m AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED;
CREATE user td identified by "123" default tablespace ts_td temporary tablespace TEMP profile DEFAULT;
alter user td identified by "123456";
grant dba to td with admin option;
14.验证一：使用sql语句验证刚才创建的表及表空间：
select username,default_tablespace from dba_users;
15.验证二：退出sqlplus,到/data01/dbffiles下查看刚才创建的dbf文件；