Oracle BBED怎么修改数据块中的数据

本篇内容介绍了“Oracle BBED怎么修改数据块中的数据”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

BBED修改数据：

建立测试数据：
SQL> create table dbhang (id number,name varchar2(20));
Table created.

SQL> insert into dbhang values(1,’baoyuhang’);
1 row created.

SQL> commit;
Commit complete.

SQL> select * from dbhang;
ID NAME
1 baoyuhang

查看文件号，块号，行号：
select
rowid,
dbms_rowid.rowid_relative_fno(rowid)rel_fno,
dbms_rowid.rowid_block_number(rowid)blockno,
dbms_rowid.rowid_row_number(rowid) rowno
from dbhang;

ROWID              REL_FNO     BLOCKNO      ROWNO

AAAVoxAABAAAW8BAAA        1       93953      0

查询数据文件：

SQL> select file# || ‘ ‘ ||name || ‘’ || bytes from v$datafile;

FILE#||’’||NAME||’’||BYTES
1 /oracle/app/oradata/prod/system01.dbf786432000
2 /oracle/app/oradata/prod/sysaux01.dbf545259520
3 /oracle/app/oradata/prod/undotbs01.dbf94371840
4 /oracle/app/oradata/prod/users01.dbf5242880
5 /oracle/app/oradata/prod/example01.dbf328335360
6 /oracle/app/oradata/prod/dbhang01.dbf52428800
7 /oracle/app/oradata/prod/dbhang02.dbf52428800

将以上查询的信息保存在文本中：

[oracle @server1 ~]$ cat datafile.txt
1 /oracle/app/oradata/prod/system01.dbf 786432000
2 /oracle/app/oradata/prod/sysaux01.dbf 545259520
3 /oracle/app/oradata/prod/undotbs01.dbf 94371840
4 /oracle/app/oradata/prod/users01.dbf 5242880
5 /oracle/app/oradata/prod/example01.dbf 328335360
6 /oracle/app/oradata/prod/dbhang01.dbf 52428800
7 /oracle/app/oradata/prod/dbhang02.dbf 52428800

关闭数据库：
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

创建BBED参数文件：

[oracle @server1 ~]$ cat bbed.par
blocksize=8192
listfile=/home/oracle/datafile.txt   //指定文本文件
mode=edit    //编辑模式

现将数据baoyuhang修改为bbbyuhang

连接BBED，进行数据定位：

[oracle @server1 ~]$ bbed parfile=/home/oracle/bbed.par
Password:

BBED: Release 2.0.0.0.0 - Limited Production on Thu Jul 30 05:59:45 2020

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

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

BBED>

指定1号文件93953号块：

BBED> set dba 1,93953 offset 0
   DBA                0x00416f01 (4288257 1,93953)
   OFFSET             0

定位数据：（确定数据在block中的偏移量）

BBED> find /c baoyuhang
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953            Offsets: 8179 to 8191           Dba:0x00416f01
62616f79 7568616e 6704066c 38

dump查看一下offset 8179信息：
BBED> dump /v dba 1,93953 offset 8179 count 128
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953   Offsets: 8179 to 8191  Dba:0x00416f01

62616f79 7568616e 6704066c 38       l baoyuhang..l8

Offsets: 8179 to 8191    代表这一行的地址。

也是说baoyuhang属于8179-8191

b:8179
a:8180
o:8181

修改 block将bao替换为bbb：

BBED> modify /c bbb dba 1,93953 offset 8179
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953            Offsets: 8179 to 8191           Dba:0x00416f01

62626279 7568616e 670106ba 3c

再次查看修改后的数据：

BBED> dump /v dba 1,93953 offset 8179 count 128
File: /oracle/app/oradata/prod/system01.dbf (1)
Block: 93953   Offsets: 8179 to 8191  Dba:0x00416f01

62626279 7568616e 6704066c 38       l bbbyuhang..l8

应用变更：

BBED> sum dba 1,93953 apply
Check value for File 1, Block 93953:
current = 0x29a2, required = 0x29a2

回到sqlplus查询修改后的数据

SQL> startup;
ORACLE instance started.

Total System Global Area  830930944 bytes
Fixed Size            2257800 bytes
Variable Size          541068408 bytes
Database Buffers      281018368 bytes
Redo Buffers            6586368 bytes
Database mounted.
Database opened.

SQL> select * from dbhang;
ID NAME
1 bbbyuhang

修改完毕.

BBED的安装： http://blog.itpub.net/69975956/viewspace-2707944/

“Oracle BBED怎么修改数据块中的数据”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！