Bbed就是英文block browse block edit的缩写，用来直接查看和修改数据文件数据的一个工具。在windows上没有提供这个工具，在linux上面有，需要编译：

db2-> cd /opt/oracle/product/11.0.13/rdbms/lib
b2->  make -f ins_rdbms.mk $ORACLE_HOME/rdbms/lib/bbed

db2-> ./bbed

Password:

#默认的密码:blockedit.

BBED: Release 2.0.0.0.0 - Limited Production on Wed Aug 12 16:01:03 2009

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

************* !!! For Oracle Internal Use only !!! ***************

BBED> help all

SET DBA [ dba | file#, block# ]

SET FILENAME filename

SET FILE file#

SET BLOCK [+/-]block#

SET OFFSET [ [+/-]byte offset | symbol | *symbol ]

SET BLOCKSIZE bytes

SET LIST[FILE] filename

SET WIDTH character_count

SET COUNT bytes_to_display

SET IBASE [ HEX | OCT | DEC ]

SET OBASE [ HEX | OCT | DEC ]

SET MODE  [ BROWSE | EDIT ]

SET SPOOL [ Y | N ]

SHOW [ <SET parameter> | ALL ]

INFO

MAP[/v] [ DBA | FILENAME | FILE | BLOCK ]

DUMP[/v] [ DBA | FILENAME | FILE | BLOCK | OFFSET | COUNT ]

PRINT[/x|d|u|o|c] [ DBA | FILE | FILENAME | BLOCK | OFFSET | symbol | *symbol ]

EXAMINE[/Nuf] [ DBA | FILE | FILENAME | BLOCK | OFFSET | symbol | *symbol ]

</Nuf>:

N - a number which specifies a repeat count.

u - a letter which specifies a unit size:

  b - b1, ub1 (byte)

  h - b2, ub2 (half-word)

  w - b4, ub4(word)

  r - Oracle table/index row

f - a letter which specifies a display format:

  x - hexadecimal

  d - decimal

  u - unsigned decimal

  o - octal

  c - character (native)

  n - Oracle number

  t - Oracle date

  i - Oracle rowid

FIND[/x|d|u|o|c] numeric/character string [ TOP | CURR ]

COPY [ DBA | FILE | FILENAME | BLOCK ] TO [ DBA | FILE | FILENAME | BLOCK ]

MODIFY[/x|d|u|o|c] numeric/character string

      [ DBA | FILE | FILENAME | BLOCK | OFFSET | symbol | *symbol ]

ASSIGN[/x|d|u|o] <target spec>=<source spec>

<target spec> : [ DBA | FILE | FILENAME | BLOCK | OFFSET | symbol | *symbol ]

<source spec> : [ value | <target spec options> ]

SUM [ DBA | FILE | FILENAME | BLOCK ] [ APPLY ]

PUSH [ DBA | FILE | FILENAME | BLOCK | OFFSET ]

POP [ALL]

REVERT [ DBA | FILE | FILENAME | BLOCK ]

UNDO

HELP [ <bbed command> | ALL ]

VERIFY [ DBA | FILE | FILENAME | BLOCK ]

CORRUPT [ DBA | FILE | FILENAME | BLOCK ]

BBED>