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What if Oracle Database cannot be opened? Believe that many inexperienced people helpless, this article summarizes the oracle database system failure solution, through this article I hope you can solve this problem.

Oracle Database System:

ORACLE database system is a group of software products with distributed database as the core provided by ORACLE Corporation of America. It is one of the most popular databases with Client/Server or B/S architecture. SilverStream, for example, is a database-based middleware. ORACLE database is the most widely used database management system in the world at present. As a general database system, it has complete data management functions.

Oracle Database System Failure Description:

1. After communicating with the user, it is understood that when the user uses the database error, the error displays "system01.dbf needs more recovery to maintain consistency, and the database cannot be opened."

2. The engineer checked the database file and found that sysaux01.dbf has bad blocks. Because the user has not made a backup of the database, the database cannot be restored through backup. After further communication with the user, the user provided all the files in the database oraclehome directory, and it is urgent to recover the data under the zxfg user.

Third, Oracle database system failure analysis:

1. Through the database error display, we can preliminarily judge that the cause of the failure may be the damage of the control file, the damage of the data file, and the inconsistency between the SCN of the data file and the control file.

2. Further detection and analysis of the database file found that there are bad blocks in sysaux01.dbf file. After fixing the number and starting the database, many queries reported errors, export and data pump tools could not be used, query alarm logs, analysis reported errors, and appeal errors occurred due to sysaux file corruption.

The database cannot be repaired at the database level. System and user table space data files are normal, you can use the underlying parsing data files, restore user data.

Oracle Database System Failure Recovery Process:

1 Using DBV to detect data files

The analysis results show that SYSAUX01.DBF file data block (Data) detection failed 40 pages, index page (Index) detection failed 29 pages, other files detection is normal.

2 Repair database, open database

3 Query database error, export and data pump error

Various attempts were made and a large amount of information was consulted. This internal error in the database cannot be fixed by command.

4 Low-level parsing, importing ZXFG user data into a new database

After reading this article, can you solve oracle database failure problem independently? If you still want to learn more skills or want to know more about related content, welcome to pay attention to the industry information channel, thank you for reading.

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