Indexes are optional structures associated with tables that allow SQL statements to execute more quickly against a table. Even though table scans are very common in many data warehouses, indexes can often speed up queries.
Both B-tree and bitmap indexes can be created as local indexes on a partitioned table, in which case they inherit the table's partitioning strategy. B-tree indexes can be created as global partitioned indexes on partitioned and nonpartitioned tables.
This section contains the following topics:
For more information about partitioned indexes, refer to Partitioning for Availability_ Manageability_ and Performance.