下边是命令行删除数据库的过程

注意：在删除数据库之前，数据库首先要处于restrict模式下。

以下为具体的删除过程：

[oracle@ocm1 ~]$ /u01/app/oracle/product/10.2.0/db_1/bin/sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.1.0 - Production on Mon May 5 06:05:31 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

SQL> select file_name from dba_data_files;

FILE_NAME
--------------------------------------------------------------------------------
/u01/app/oracle/yallonking/system01.dbf
/u01/app/oracle/yallonking/undotbs01.dbf
/u01/app/oracle/yallonking/sysaux01.dbf

SQL> show parameter dump

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
background_core_dump                 string      partial
background_dump_dest                 string      /u01/app/oracle/yallonking/bdu
                                                 mp
core_dump_dest                       string      /u01/app/oracle/yallonking/cdu
                                                 mp
max_dump_file_size                   string      10240
shadow_core_dump                     string      partial
user_dump_dest                       string      /u01/app/oracle/yallonking/udu
                                                 mp
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount restrict;
ORACLE instance started.

Total System Global Area  314572800 bytes
Fixed Size                  1219184 bytes
Variable Size              96470416 bytes
Database Buffers          213909504 bytes
Redo Buffers                2973696 bytes
Database mounted.
SQL> drop database;

Database dropped.

Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> 

下边是删除过程中alert中的记录，可以发现该命令会将数据文件,redo,controlfile,tempfile从OS上物理的删除，其实，一并删除的还有spfile.
alert如下：

Mon May  5 06:08:18 2014
Starting ORACLE instance (restrict)
Cannot determine all dependent dynamic libraries for /proc/self/exe
Unable to find dynamic library libocr10.so in search paths
RPATH = /ade/aime1_build2101/oracle/has/lib/:/ade/aime1_build2101/oracle/lib/:/ade/aime1_build2101/oracle/has/lib/:
LD_LIBRARY_PATH is not set!
The default library directories are /lib and /usr/lib
Unable to find dynamic library libocrb10.so in search paths
Unable to find dynamic library libocrutl10.so in search paths
Unable to find dynamic library libocrutl10.so in search paths
LICENSE_MAX_SESSION = 0
LICENSE_SESSIONS_WARNING = 0
Picked latch-free SCN scheme 2
Using LOG_ARCHIVE_DEST_1 parameter default value as /u01/app/oracle/product/10.2.0/db_1/dbs/arch
Autotune of undo retention is turned on. 
IMODE=BR
ILAT =18
LICENSE_MAX_USERS = 0
SYS auditing is disabled
ksdpec: called for event 13740 prior to event group initialization
Starting up ORACLE RDBMS Version: 10.2.0.1.0.
System parameters with non-default values:
  processes                = 150
  sga_max_size             = 314572800
  __shared_pool_size       = 88080384
  __large_pool_size        = 4194304
  __java_pool_size         = 4194304
  __streams_pool_size      = 0
  sga_target               = 314572800
  control_files            = /u01/app/oracle/yallonking/control1, /u01/app/oracle/yallonking/control2
  __db_cache_size          = 213909504
  log_checkpoint_interval  = 10000
  db_files                 = 180
  db_file_multiblock_read_count= 8
  undo_management          = AUTO
  undo_tablespace          = undotbs
  global_names             = TRUE
  parallel_max_servers     = 5
  background_dump_dest     = /u01/app/oracle/yallonking/bdump
  user_dump_dest           = /u01/app/oracle/yallonking/udump
  max_dump_file_size       = 10240
  core_dump_dest           = /u01/app/oracle/yallonking/cdump
  db_name                  = test
PMON started with pid=2, OS id=25669
PSP0 started with pid=3, OS id=25671
MMAN started with pid=4, OS id=25673
DBW0 started with pid=5, OS id=25675
LGWR started with pid=6, OS id=25677
SMON started with pid=8, OS id=25681
CKPT started with pid=7, OS id=25679
RECO started with pid=9, OS id=25683
MMON started with pid=10, OS id=25685
MMNL started with pid=11, OS id=25687
Mon May  5 06:08:18 2014
ALTER DATABASE   MOUNT
Mon May  5 06:08:22 2014
Setting recovery target incarnation to 1
Mon May  5 06:08:22 2014
Successful mount of redo thread 1, with mount id 2144881106
Mon May  5 06:08:22 2014
Database mounted in Exclusive Mode
Completed: ALTER DATABASE   MOUNT
Mon May  5 06:08:28 2014
drop database
Deleted file /u01/app/oracle/yallonking/system01.dbf
Deleted file /u01/app/oracle/yallonking/undotbs01.dbf
Deleted file /u01/app/oracle/yallonking/sysaux01.dbf
Deleted file /u01/app/oracle/yallonking/redo01.log
Deleted file /u01/app/oracle/yallonking/redo02.log
Deleted file /u01/app/oracle/yallonking/redo03.log
Deleted file /u01/app/oracle/yallonking/temp01.dbf
Instance terminated by USER, pid = 25689
Mon May  5 06:08:33 2014
Deleted file /u01/app/oracle/yallonking/control1
Deleted file /u01/app/oracle/yallonking/control2
Completed: drop database
Mon May  5 06:08:33 2014
Shutting down instance (abort)
License high water mark = 1