Where does the oracle database data exist?

Oracle database data storage location: Data file: stores the actual data blocks. Redo log file: records changes to data files and is used to recover data after a crash. Control file: stores database structure and data file location information. Temporary table space: stores temporary data and is used to perform queries and updates. Persistent table space: stores permanent data such as tables and indexes. Additionally, data can be stored in rollback segments, views, materialized views, IOTs, and external tables.

Oracle database data storage location

Oracle database data is stored in the following location:

Data file

• Storage actual data blocks
• Can be a single file or a collection of multiple files

Redo log File

• Stores a record of changes made to data files
• Used to recover data after a crash

Control file

• Stores information about database structure and data file location
• Used to start and shut down the database

Temporary table space

• Storage temporary data
• Used to perform SQL queries and updates

Persistent table space

• Store persistent data
• For storing tables and indexes

Other locations

In addition to these primary locations, Oracle Database Data can also be stored in the following locations:

• Rollback Segment: Stores a temporary copy of changes made during a transaction
• View: Store virtual data sets based on other tables
• Materialized views : Store pre-computed copies of data to improve query performance
• Index-organized tables (IOT ): Use index structures to store data to improve query performance
• External tables: Connect to data in external data sources (such as files or other databases)

The above is the detailed content of Where does the oracle database data exist?. For more information, please follow other related articles on the PHP Chinese website!