By Lilian Hobbs PhD, Susan Hillson MS in CIS Boston University, Visit Amazon's Shilpa Lawande Page, search results, Learn about Author Central, Shilpa Lawande, , Pete Smith
Oracle 10g information Warehousing is a advisor to utilizing the knowledge Warehouse positive factors within the most up-to-date model of Oracle -Oracle Database 10g. Written through humans at the Oracle improvement staff that designed and carried out the code and by means of individuals with adventure enforcing warehouses utilizing Oracle know-how, this completely up-to-date and prolonged version presents an insider's view of the way the Oracle Database 10g software program is better used on your application.It presents a close examine the hot gains of Oracle Database 10g and different Oracle items and the way those are utilized in the information warehouse. This e-book will provide help to installation the Oracle database and properly use the recent Oracle Database 10g gains in your info warehouse. It comprises walkthroughs and examples on how you can use instruments akin to Oracle Discoverer and experiences to question the warehouse and generate studies that may be deployed over the internet and achieve higher perception into your business.This how-to consultant presents step-by-step directions together with reveal captures to assist you layout, construct and optimize functionality of the information warehouse or information mart. it's a 'must have' reference for database builders, directors and IT execs who are looking to get to paintings now with all the latest positive factors of Oracle Database 10g. It presents a close examine the hot positive factors of Oracle Database 10g and different Oracle items and the way those are utilized in the information warehouse, including:* the right way to use the precis administration positive factors, together with Materialized perspectives and question rewrite, to top influence to extensively increase question functionality* how you can set up enterprise intelligence to the net to fulfill brand new altering and critical company standards* utilizing Oracle OLAP and information Mining recommendations* tips to comprehend the warehouse surroundings and the way it really is utilized by new beneficial properties within the database together with how one can enforce a excessive availability warehouseenvironment* utilizing the new administration infrastructure in Oracle Database 10g and the way this permits you to deal with your warehouse surroundings
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Additional info for Oracle 10g Data Warehousing
Multiple levels of aggregation can be calculated using cube, rollup, and grouping sets. Most calculations are done directly within the server. These functions allow the OLAP queries to be expressed without complex self-joins and subqueries and allow the optimizer to choose a better execution plan. Data mining functionality is provided with the Data Mining option of the Enterprise Edition for making classiﬁcations, predictions, and associations. Data mining is part of the knowledge discovery process.
This is a three-dimensional query: the dimensions are products, time, and geographical region. An analyst may need to compare this month’s sales to the same month last year for each store versus the Internet site. He or she may drill down to a more detailed level in the hierarchy to get the sales for individual stores to determine which ones are most proﬁtable and which may have lost money. The Data Warehouse Requires a Different Database Design Data warehouses are designed for quick retrieval, when the access path is not known in advance.
The sales numbers are the facts. Store, region, and quarter are the dimensions the data is analyzed by and are used to organize the data. With dimensional modeling, denormalization and redundancy are introduced. , the example which will be used throughout this book. The logical design is converted to a physical representation that will best optimize performance and manageability. Tables, constraints, indexes, and partitions are deﬁned. Oracle has added several features to support dimensional designs.