在UltraEdit中定位数据文件内容

一、定位数据块
1.bbed查看数据块

--第一个数据块
BBED> set block 1
        BLOCK#          1
BBED> dump count 16
 File: /opt/oracle/oradata/chf/example01.dbf (0)
 Block: 1                Offsets:    0 to   15           Dba:0x00000000
------------------------------------------------------------------------
 0ba20000 01004001 00000000 00000104 

 <32 bytes per line>

BBED> dump count 128
 File: /opt/oracle/oradata/chf/example01.dbf (0)
 Block: 1                Offsets:    0 to  127           Dba:0x00000000
------------------------------------------------------------------------
 0ba20000 01004001 00000000 00000104 387a0000 00000000 0003200b 74684acd 
 43484600 00000000 7d4a0000 00320000 00200000 05000300 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 d28a0900 00000000 1ab5d72c f7b4d72c c5320900 00000000 00000000 

 <32 bytes per line>

--第二个数据块

BBED> set block 2
        BLOCK#          2

BBED> dump count 128
 File: /opt/oracle/oradata/chf/example01.dbf (0)
 Block: 2                Offsets:    0 to  127           Dba:0x00000000
------------------------------------------------------------------------
 1da20000 02004001 08dee400 00000204 f6b80000 05000000 08000000 00320000 
 09000000 50000000 feff3f00 07000000 00320000 7f000000 fa010000 07dee400 
 00000000 00000000 00000000 00000000 b1220000 08000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 

 <32 bytes per line>

--第100个数据块
BBED> set block 100
        BLOCK#          100

BBED> dump count 128
 File: /opt/oracle/oradata/chf/example01.dbf (0)
 Block: 100              Offsets:    0 to  127           Dba:0x00000000
------------------------------------------------------------------------
 06a20000 64004001 343f0900 00000104 a38d0000 02002000 e1c90000 343f0900 
 0000e81f 021f3200 61004001 00000000 00000000 00000000 00000000 00000000 
 00000000 05000900 2c010000 52008000 c8005900 00800000 a3350900 00000000 
 00000000 00008001 00000000 6b00fa00 5e1a6419 00000000 00000000 00000000 

 <32 bytes per line>

2.UltraEdit查看数据块

--第0个数据块
--(为了便于和bbed的block一致，称为0比较合适，因为这个块在bbed中看不到)
00000000h: 00 A2 00 00 00 00 C0 FF 00 00 00 00 00 00 00 00 ; .?...?........
00000010h: 66 C8 00 00 00 20 00 00 00 32 00 00 7D 7C 7B 7A ; f?.. ...2..}|{z
00000020h: A0 81 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; 爜..............
00000030h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
……………………………………………………
00001fa0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
00001fb0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
00001fc0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
00001fd0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
00001fe0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
00001ff0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................  
--第一个数据块（bbed中的block 1）
00002000h: 0B A2 00 00 01 00 40 01 00 00 00 00 00 00 01 04 ; .?...@.........
00002010h: 38 7A 00 00 00 00 00 00 00 03 20 0B 74 68 4A CD ; 8z........ .thJ?
……………………………………………………………
000021c0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
000021d0h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
--第二个数据块(bbed中的block 2)
00004000h: 1D A2 00 00 02 00 40 01 08 DE E4 00 00 00 02 04 ; .?...@..掬.....
00004010h: F6 B8 00 00 05 00 00 00 08 00 00 00 00 32 00 00 ; 龈...........2..
00004020h: 09 00 00 00 50 00 00 00 FE FF 3F 00 07 00 00 00 ; ....P...??.....
00004030h: 00 32 00 00 7F 00 00 00 FA 01 00 00 07 DE E4 00 ; .2.....?...掬.
00004040h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
--第100个数据块(bbed中的block 100)
000c8000h: 06 A2 00 00 64 00 40 01 34 3F 09 00 00 00 01 04 ; .?.d.@.4?......
000c8010h: A3 8D 00 00 02 00 20 00 E1 C9 00 00 34 3F 09 00 ; .... .嵘..4?..
000c8020h: 00 00 E8 1F 02 1F 32 00 61 00 40 01 00 00 00 00 ; ..?..2.a.@.....
000c8030h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................
000c8040h: 00 00 00 00 05 00 09 00 2C 01 00 00 52 00 80 00 ; ........,...R.€.
000c8050h: C8 00 59 00 00 80 00 00 A3 35 09 00 00 00 00 00 ; ?Y..€..?......
000c8060h: 00 00 00 00 00 00 80 01 00 00 00 00 6B 00 FA 00 ; ......€.....k.?
000c8070h: 5E 1A 64 19 00 00 00 00 00 00 00 00 00 00 00 00 ; ^.d.............

3.结论:因为2000(16进制)=8192(10进制),而每行又是16，所以UltraEdit定位块的规则是
SELECT to_char(’2*块数’,’xxxxxxx’) xff FROM dual;(xff*1000)

SQL> SELECT TO_number('2000','xxxxxx') FROM dual;

TO_NUMBER('2000','XXXXXX')
--------------------------
                      8192

二、UltraEdit定位块内内容
1.bbed查看内容

--第一块偏移量为484数据
BBED> set block 1
        BLOCK#          1

BBED> set offset 484
        OFFSET          484

BBED> dump count 128
 File: /opt/oracle/oradata/chf/example01.dbf (0)
 Block: 1                Offsets:  484 to  611           Dba:0x00000000
------------------------------------------------------------------------
 c052e700 00000000 ec82ba2d 01000000 2e060000 39020000 10008984 02000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 

 <32 bytes per line>

--第一块偏移量为8188数据
BBED> dump offset 8188 count 128
 File: /opt/oracle/oradata/chf/example01.dbf (0)
 Block: 1                Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 010b0000 

 <32 bytes per line>

2.UltraEdit中内容

--offset 484(kscnbas)
000021e0h: 00 00 00 00 C0 52 E7 00 00 00 00 00 EC 82 BA 2D ; ....繰?....靷?    
000021f0h: 01 00 00 00 2E 06 00 00 39 02 00 00 10 00 89 84 ; ........9.....墑
00002200h: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................

--offset 8188(tailchk) 
00003ff0h: 00 00 00 00 00 00 00 00 00 00 00 00 01 0B 00 00 ; ................

3.结论:10进制的便宜量转换为16进制，然后对照你块开始行号+偏移量(16进制),得到对应偏移量开始位置

SQL> SELECT to_char('484','xxxxxxx') FROM dual;

TO_CHAR('484','X
----------------
     1e4

SQL> SELECT to_char('8188','xxxxxxx') FROM dual;

TO_CHAR('8188','
----------------
    1ffc

三.补充说明
1.本实验是拷贝linux下11g数据文件到win上使用UltraEdit操作得出
2.使用UltraEdit,需要熟悉对一些关键数据的偏移量比较清楚

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