Oracle recovers the database from oraa and dbf files

prm-dul can be accessed directly from. Extract the data from the Oracle table in the dbf data file.

Oracle DBA: PRM-DUL disaster recovery tool and schema-level data recovery. PRM-Dulfor Oracle Database Schema-level Oracle Database Data Recovery Feature, PRM is an enterprise-level Oracle database disaster recovery tool.

PRM can restore truncated tables without backup, and can also restore data in Oracle databases that cannot be opened (alter database open failed).

Recovery method of oralce cold backup:

Install the exact same version of the database as before, including parameter configuration, sid.

Shut down the database and delete the controlfile, logfile, and datafile.

Copy the controlfile, logfile, and datafile of your original crashed reservation to the directory you deleted.

Open the database.

Open directly at the database level and then export the data, or extract the data through a tool.

Hello! To extract data from Oracle's DBF file, you can use a tool provided by Oracle or a third-party tool. Here are some commonly used methods:

1.Use tools provided by Oracle: You can export data using tools such as Oracle SQL Developer or Oracle Data Pump.

In SQL Developer, you can use the Export Wizard to select the table or query you want to export, and select the format you want to export, such as CSV or Excel. In Data Pump, you can use the expdp command to export data. 2.

Use third-party tools: There are many third-party tools that can help you extract data from Oracle DBF files, such as Toad for Oracle, SQL*Plus, etc. These tools offer more options and features to fill your needs.

No matter which method you choose, you need to pay attention to the following:1Make sure you have sufficient permissions to access and export the data.

2.Make sure you choose the correct format and encoding to ensure the integrity and accuracy of your data. 3.

Before exporting the data collapse, it is best to make a backup to prevent data loss or corruption. Hope you find this information helpful!

A DBF file in Oracle is a database file, which refers to a file that stores data on a computer.

dbf is a special file format, which represents database files, data generated by database processing systems such as foxbase, dbase, visual foxpro, etc.

Common database file formats are as follows: CSV comma-separated value files; DAT data files; Wrodperfect Merges Data Tank Bridge Documents; Paradox 7 table of DB Borland; DBC Microsoft Visual FoxPro database container file.

The suffix dbf is a system tablespace file, a user data file, a temporary tablespace file, and a revocation tablespace file. These are all system files for the oracle database. In addition to the above files, there are also suffixes CTL is the control file and log is the online redo log file.

The full name of DBF is database datafile, that is, database data file, so the file system is generally used as the oracle file storage. The dbf extension is not used in practice. DBF doesn't matter.

Some people set the archive log as well. dbf's extension.

A data file, where the data is saved.

This may be a problem that some new O&M personnel or maintenance personnel have to encounter, how to recover the data in an old database with only dbf files left? In fact, this problem is divided into many situations, please check the number yourself: 1) All the dbf files in the database are there, there is no missing, and there is no damage This situation is the easiest way to build a parameter file by yourself, and create a control file based on these dbf files, and then try to open the database.

If the data files are clean and clean, then they can be opened directly. If the data file is dirty, there is no redolog here, so you need to open the database by hiding the parameters, etc. 2) There is a small amount of missing database dbf, the missing is mainly non-data files, and there is no damage in this case, it is good to drop the missing data files offlineon the basis of 1), because the corresponding data files are gone, then it is normal to lose the data on the corresponding data files 3) The database dbf has a small number of missing, the missing is mainly non-data files, and the non-data files are damaged a small amount in this case, it is not a big problem to open the database on the basis of 2) However, after opening the database, due to a small amount of damage in other tablespace data files, errors such as ORA-1578, ORA-8103, ORA-1410, and ORA-00600 may occur when accessing user data, which is relatively easy to overcome4) There are a small number of missing database dbf, and the missing is mainly non-data files, which is not easy to open the database in this case, and it may be necessary to use BBED technology to modify it in order to open the database5) There is only a part of the dbf, which is still missing, don't expect to be able to open the database, you can only use software such as prm-dul to extract the data directly, the above situation 1) 4) as long as it is still there or the damage is not too serious, then you can be opened by professional and technical personnel to export the data, but in case 5) you can only use dul tools to extract data.

If you can't figure it out yourself, you can find a professional oracle database repair team member of Shitan Software to help you recover! Shitan Software professional database repair team.

Yes, open it in Excel and import it into Oracle format