ora-01157: cannot identify/lock data file 6 - see dbwr trace file ora-01110: 解决方法
今天登陆到数据库做了一个小测试后 忘记了用命令删除表空间，直接在linux下删掉了数据文件，
结果，悲剧就开始了。(弄明白了整理出来大家共同study)
实验环境：
[oracle@tyger ~]$ cat /etc/redhat-release
red hat enterprise linux server release 4.6 (tikanga)
[oracle@tyger ~]$ . .bash_profile
[oracle@tyger ~]$ sqlplus / as sysdba
sql*plus: release 10.2.0.1.0 - production on sat mar 1 15:54:53 2014
copyright (c) 1982, 2005, oracle. all rights reserved.
connected to:
oracle database 10g enterprise edition release 10.2.0.1.0 - production
with the partitioning, olap and data mining options
sys@orcl>select status from v$instance;
status
------------
open
sys@orcl>select * from v$version;
banner
----------------------------------------------------------------
oracle database 10g enterprise edition release 10.2.0.1.0 - prod
pl/sql release 10.2.0.1.0 - production
core 10.2.0.1.0 production
tns for linux: version 10.2.0.1.0 - production
nlsrtl version 10.2.0.1.0 - production
查看一下当前数据库中的数据文件有哪些
用到 数据字典 （dba_data_files dba_tablespaces ) 和 v$datafile
sys@orcl>select tablespace_name,file_name from dba_data_files;
tablespace_name
------------------------------
file_name
--------------------------------------------------------------------------------
users
/u01/app/oracle/oradata/orcl/users01.dbf
sysaux
/u01/app/oracle/oradata/orcl/sysaux01.dbf
undotbs1
/u01/app/oracle/oradata/orcl/undotbs01.dbf
tablespace_name
------------------------------
file_name
--------------------------------------------------------------------------------
system
/u01/app/oracle/oradata/orcl/system01.dbf
example
/u01/app/oracle/oradata/orcl/example01.dbf
sys@orcl>col file_name for a50
sys@orcl>col tablespace_name for a10
sys@orcl>/
tablespace file_name
---------- --------------------------------------------------
users /u01/app/oracle/oradata/orcl/users01.dbf
sysaux /u01/app/oracle/oradata/orcl/sysaux01.dbf
undotbs1 /u01/app/oracle/oradata/orcl/undotbs01.dbf
system /u01/app/oracle/oradata/orcl/system01.dbf
example /u01/app/oracle/oradata/orcl/example01.dbf
sys@orcl>select tablespace_name,status,contents from dba_tablespaces;
tablespace status contents
---------- --------- ---------
system online permanent
undotbs1 online undo
sysaux online permanent
temp online temporary
users online permanent
example online permanent
6 rows selected.
sys@orcl>select file#,ts#,name from v$datafile;
file# ts#
---------- ----------
name
--------------------------------------------------------------------------------
1 0
/u01/app/oracle/oradata/orcl/system01.dbf
2 1
/u01/app/oracle/oradata/orcl/undotbs01.dbf
3 2
/u01/app/oracle/oradata/orcl/sysaux01.dbf
file# ts#
---------- ----------
name
--------------------------------------------------------------------------------
4 4
/u01/app/oracle/oradata/orcl/users01.dbf
5 6
/u01/app/oracle/oradata/orcl/example01.dbf
sys@orcl>col name for a50
sys@orcl>l
1* select file#,ts#,name from v$datafile
sys@orcl>/
file# ts# name
---------- ---------- --------------------------------------------------
1 0 /u01/app/oracle/oradata/orcl/system01.dbf
2 1 /u01/app/oracle/oradata/orcl/undotbs01.dbf
3 2 /u01/app/oracle/oradata/orcl/sysaux01.dbf
4 4 /u01/app/oracle/oradata/orcl/users01.dbf
5 6 /u01/app/oracle/oradata/orcl/example01.dbf
开始创建测试表空间 tyger 存储位置 '/u01/app/oracle/oradata/orcl/tyger01.dbf' 大小为 5m。
sys@orcl>create tablespace tyger datafile '/u01/app/oracle/oradata/orcl/tyger01.dbf' size 5m;
tablespace created.
sys@orcl>select tablespace_name,file_name,status from dba_data_files;
tablespace file_name status
---------- -------------------------------------------------- ---------
users /u01/app/oracle/oradata/orcl/users01.dbf available
sysaux /u01/app/oracle/oradata/orcl/sysaux01.dbf available
undotbs1 /u01/app/oracle/oradata/orcl/undotbs01.dbf available
system /u01/app/oracle/oradata/orcl/system01.dbf available
example /u01/app/oracle/oradata/orcl/example01.dbf available
tyger /u01/app/oracle/oradata/orcl/tyger01.dbf available
6 rows selected.
sys@orcl>!
[oracle@tyger ~]$ cd $oracle_base/oradata/orcl/
[oracle@tyger orcl]$ ll
total 1068456
-rw-r----- 1 oracle oinstall 7061504 mar 1 16:06 control01.ctl
-rw-r----- 1 oracle oinstall 7061504 mar 1 16:06 control02.ctl
-rw-r----- 1 oracle oinstall 7061504 mar 1 16:06 control03.ctl
-rw-r----- 1 oracle oinstall 104865792 mar 1 15:47 example01.dbf
-rw-r----- 1 oracle oinstall 52429312 mar 1 15:47 redo01.log
-rw-r----- 1 oracle oinstall 52429312 mar 1 16:06 redo02.log
-rw-r----- 1 oracle oinstall 52429312 mar 1 15:47 redo03.log
-rw-r----- 1 oracle oinstall 251666432 mar 1 16:05 sysaux01.dbf
-rw-r----- 1 oracle oinstall 503324672 mar 1 16:05 system01.dbf
-rw-r----- 1 oracle oinstall 20979712 mar 1 08:42 temp01.dbf
-rw-r----- 1 oracle oinstall 5251072 mar 1 16:03 tyger01.dbf
-rw-r----- 1 oracle oinstall 26222592 mar 1 16:05 undotbs01.dbf
-rw-r----- 1 oracle oinstall 5251072 mar 1 15:47 users01.dbf