How to write one or more data files in oracle

The table space of Oracle database contains one or more data files, which store actual data: basic files: store actual data temporary files: store temporary data rollback segment files: store rollback information undo segment files : Stores uncommitted changes to a table

Oracle contains one or more data files

Short answer: The tablespace of an Oracle database contains one or more data files, which store the actual data.

Detailed answer:

The table space of Oracle database is a logical storage unit used to organize and manage data. Each tablespace consists of one or more data files, which are the physical files that actually store the data.

Type of data file:

• Basic file: Stores the actual data.
• Temporary files: Used for temporary data, such as sorting or hashing operations.
• Rollback segment file: Used to store rollback information to restore transactions when an error occurs.
• Undo segment file: Used to store uncommitted changes to the table.

The relationship between table space and data files:

Table space is a logical concept, while data files are physical files. Each tablespace can contain multiple data files to spread the data across multiple physical devices, improving performance and availability. Each data file belongs to a table space and can be associated only with that table space.

Creation of data files:

You can use the CREATE DATAFILE statement to create data files. This statement specifies the name, size, and directory of the data file. For example:

<code>CREATE DATAFILE 'datafile01.dbf' SIZE 100M AUTOEXTEND ON NEXT 10M MAXSIZE 500M;</code>

Management of data files:

Data files can be added, deleted and modified in the table space. It can be managed through the ALTER DATABASE command. For example, you can expand the size of the data file or move it to a different directory.

Data file failure:

If the data file is damaged or inaccessible, the Oracle database may become unavailable. Data files can be recovered and the database restored through recovery programs.

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