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2025-09-23 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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Bbed is a tool used within oracle to view and modify data files directly. It can directly modify the contents of Oracle data file blocks, which is useful in some special recovery scenarios.
Byte order
The CPU Power series corresponding to AIX is called Big end.
Intel's corresponding CPU is called Xiao Duan.
The former rule, in which the least significant byte comes first, is called the small end method (little endian).
The latter rule, in which the most significant byte comes first, is called big endian.
SQL > desc v$database
SQL > select dbid,name from v$database
DBID NAME
--
2826565105 MYDB
SQL >
View machine type
SQL > select d.PLATFORMAN name, v$DATABASE d WHERE tp.PLATFORM_NAME = d.PLATFORM_NAME
PLATFORM_NAME
ENDIAN_FORMAT
-
Linux x86 64-bit
Little
A short paragraph is a flashback. We need to convert the f1f579a8 into two.
Parse dbid and dbname through BBED
SQL > select to_number ('a879f5f1') from dual
TO_NUMBER ('A879F5F1', 'XXXXXXXXXXXXXXXXXXXXXXXXXXXX')
-
2826565105
SQL > select chr (to_number (substr ('4d59444200000000)) (substr (' 4d5944420000000)) from dba_objects where rownum
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