C H A P T E R 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. A materialized view allows you to execute a 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, at some later point in time you can re-run the MV query and store the fresh results in the underlying table. There are two main uses for materialized views:
- Replicating of data to offload query workloads to separate ...
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