Database Oracle The Secrets of Materialized Views Tutorial

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Tutorial: Database Oracle The Secrets of Materialized Views Tutorial

In this article you'll find out what materialized views are, what they can do and, most importantly, how they work - a lot of the ' magic ' goes on behind the scenes. Having gone to the trouble of creating it, you'll find out how to make sure that your ma

Tutorial Details:

The Secrets of Materialized Views

Materialized views are a data warehousing/decision support system tool that can increase by many orders of magnitude the speed of queries that access a large number of records. In basic terms, they allow a user to query potentially terabytes of detail data in seconds. They accomplish this by transparently using pre-computed summarizations and joins of data. These pre-computed summaries would typically be very small compared to the original source data.

In this article you'll find out what materialized views are, what they can do and, most importantly, how they work - a lot of the ' magic ' goes on behind the scenes. Having gone to the trouble of creating it, you'll find out how to make sure that your materialized view is used by all queries to which the view is capable of providing the answer. Sometimes, you know Oracle could use the materialized view, but it is not able to do so simply because it lacks important information.

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