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Starting with Oracle Database 11g, interval partitioning can also be used
to automatically create new fixed ranges as needed during data insertions.
Many of these partitioning types can be used in combination as ???composite??? partitions.
Examples of composite partitions in Oracle Database 11g include range-range,
range-hash, range-list, list-range, list-hash, and list-list.
Data Guard
Oracle first introduced a standby database feature in Oracle 7.3. The standby database
provides a copy of the production database to be used if the primary database is
lost??”for example, in the event of primary site failure or during routine maintenance.
Primary and standby databases may be geographically separated. The standby
database is created from a copy of the production database and updated through the
application of archived redo logs generated by the production database. Data Guard,
26 | Chapter 1: Introducing Oracle
first introduced in Oracle9i, fully automates this process; previously, you had to
manually copy and apply the logs.


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