How can Oracle Materialized Views be used to speed up data
warehouse queries?
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Answer Posted / mallika
In data warehouses, you can use materialized views to
precompute and store aggregated data such as the sum of
sales.
Materialized views are often referred to as summaries,
because they store summarized data. They can also be used
to precompute joins with or without aggregations.
A materialized view eliminates the overhead associated with
expensive joins and aggregations for a large or important
class of queries
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