CHAPTER 15
Materialized Views
Materialized view (MV) technology was introduced in Oracle Database version 7. This feature was originally called snapshots, and you can still see this nomenclature reflected in some data dictionary structures. An MV allows you to execute an SQL query at a point in time and store the result set in a table (either locally or in a remote database). After the MV is initially populated, you can later rerun the MV query and store the fresh results in the underlying table. There are two main uses for MVs:
- Replicating of data to offload query workloads to separate reporting databases
- Improving performance of queries by ...
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