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2/3/2014 Parti ti oni ng i n Data Warehouses http://docs.oracle.com/cd/B19306 01/serv er.102/b14223/parpart.htm 1/53 Oracle® Database Data Warehousing Guide 10g Release 2 (10.2) B14223-02 Home Book List Conten ts Index Mast er Index  Contact Us Previous Nex t PDF · Mobi · ePub 5 Partitioning in Data Warehouses Data warehouses often contain large tables and require techniques both for managing these large tables and for providing good query performance across these large tables. This chapter discusses partitioning, a key methodology for addressing these needs. The following topics are discussed: Types of Partitioning Partition-Wise Joins Partition Maintenance Partitioning and Subpartitioning Columns and Keys Partition Bounds for Range Partitioning Index Partitioning Types of Partitioning This section describes the partitioning features that significantly enhance data access and improve overall application performance. This is especially true for applications that access tables and indexes with millions of rows and many gigabytes of data. Partitioned tables and indexes facilitate administrative operations by enabling these operations to work on subsets of data. For example, you can add a new partition, organize an existing partition, or drop a partition with minimal to zero interruption to a read-only application. Using the partitioning methods described in this section can help you tune SQL statements to avoid unnecessary index and table scans

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