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How can Oracle Materialized Views be used to speed up data warehouse queries?

April 26, 2017Data materialized Oracle queries speed Used warehouse

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How can Oracle Materialized Views be used to speed up data warehouse queries?

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With “Query Rewrite” (QUERY_REWRITE_ENABLED=TRUE in INIT.ORA) Oracle can direct queries to use pre-aggregated tables instead of scanning large tables to answer complex queries. Materialized views in a W/H environments is typically referred to as summaries, because they store summarized data.