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The database is the collection of logical and physical structures that together contain all the data and metadata for your applications. The database also contains control structures (such as control files) that it needs for startup and operation. All of these structures are described in subsequent sections, and are summarized in Figure: Database Storage Structure.
The Oracle Database XE instance (which consists of the Oracle Database XE background processes and allocated memory) works with a single database only. Rather than enabling you to create multiple databases to accommodate different applications, Oracle Database XE uses a single database, and accommodates multiple applications by enabling you to separate data into different schemas. See "About User Accounts" for more information about schemas.
The maximum database size in Oracle Database XE is 5 gigabytes (GB). This includes between 0.5 and 0.9 GB for the data dictionary, internal schemas, and temporary space, which leaves just over 4.0 GB for user data.
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See Also: See "Internal User Accounts" for information about internal schemas, and "Tablespaces" for information about temporary space. |