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Utah Geek Events Big Mountain Data: Oracle Analytic Views: Worth It?
The document discusses Oracle's analytic views, outlining their functionality, advantages, and how to build and query them. It highlights that analytic views simplify SQL for analytic queries and can enhance performance in data warehousing and reporting. Additionally, the document provides insights on the structure and creation of analytic views, including the use of hierarchies and measures.
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Utah Geek Events Big Mountain Data: Oracle Analytic Views: Worth It?
- 1. TH Technology Analytic Views forMortals: Worth A Look? When and Where Karen Cannell kcannell@thtechnology.com TH Technology
- 2. Thanks to ourSponsors! Partners Premier Logo:
- 3. TH TechnologyTH Technology AnalyticalViews for Mortals … • Oracle Analytical Views • How to Build, How to Query • Not Just for OLAP and BI
- 4. TH TechnologyTH Technology AboutMe … • TH Technology – Oracle Consulting Services, APEX Focus • Mechanical/SW Engineer - Analyzed, designed, developed, converted, upgraded, enhanced legacy & database applications for 30+ years • Building Web/APEX applications for government, medical, engineering industries since HTMLDB beginnings • Leveraging Oracle 10g,11g,12c,18 suite of tools • Editor Emeritus, ODTUG Technical Journal • Oracle Ace • APress Author • ODTUG Director
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- 6. TH TechnologyTH Technology AboutYou … • Oracle Technology ? • OLAP Users? • APEX Users ? • Why Are You Here? Analytics …
- 7. TH TechnologyTH Technology Agenda •What Are Analytical Views • How to Build • How to Query • Who ~ Why ~ When ~Where to Use • Questions ~ Discussion
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- 9. TH TechnologyTH Technology OracleObjects • Table • Data Storage in Rows/Columns • View - Virtual Table, • No Data Storage (Stored SQL Query) • Materialized View • Stored Query Results
- 10. TH TechnologyTH Technology AnalyticView • No Data Storage • Organize Data via Dimensional Model • Navigation, Join, Aggregation, Calculation Rules Built In • Complex Object → Simpler Queries
- 11. TH TechnologyTH Technology AnalyticViews • Layer on Top of Star Schema • Fact Data Included in AV • Dimensions, Hierarchies Defined in the AV • Calculations Defined in the AV • Metadata Built Into the AV 19
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- 13. TH Technology Slide perBud Endress, Oct 2017
- 14. TH TechnologyTH Technology AnalyticViews • Oracle 12.2 + • No Cost Feature • Like a View • Does Not Store Data • Query via SQL • Access Data from Other Objects • Join Multiple Tables
- 15. TH TechnologyTH Technology AnalyticViews • Simplify SQL for Analytic Queries • No Joins, No GROUP BYs • Calculations Defined in Analytic View • Aggregates ~ Calculations ~ Ranks ~ Forecasts • Query Calc’d Values from the Analytic View Make Dimensional, Hierarchical Analyses More Accessible ➔➔➔ Simpler, Faster Development
- 16. TH Technology Analytic Views: to BuildHowto Build Attr Dimensions Hierarchies Analytic Views
- 17. TH TechnologyTH Technology Tools •Oracle Database 12.2 + • Oracle XE 18 (When Released) https://www.oracle.com/database/technologies/appd ev/xe.html • SQL Developer https://www.oracle.com/database/technologies/appdev/sql -developer.html • LiveSQL https://livesql.oracle.com
- 18. TH TechnologyTH Technology Data •Example Sales History Schema • Fact Tables: • SALES, COSTS • Dimension Tables: • PRODUCTS, CUSTOMERS, PROMONTIONS, TIMES
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- 20. TH TechnologyTH Technology AnalyticView Objects ATTRIBUTE DIMENSION HIERARCHY Simple SQL
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- 22. TH TechnologyTH Technology SystemPrivileges • CREATE ANALYTIC VIEW • CREATE ANY ANALYTIC VIEW • ALTER ANY ANALYTIC VIEW • DROP ANY ANALYTIC VIEW • CREATE ATTRIBUTE DIMENSION • CREATE ANY ATTRIBUTE DIMENSION • ALTER ANY ATTRIBUTE DIMENSION • DROP ANY ATTRIBUTE DIMENSION • CREATE HIERARCHY • CREATE ANY HIERARCHY • ALTER ANY HIERARCHY • DROP ANY HIERARCHY
- 23. TH TechnologyTH Technology ObjectPrivileges • SELECT - Query • READ - Query • ALTER - Rename Example grants: GRANT ALL ON AVDEMO.SALES_AV TO AV_USER2; GRANT ALTER ON AVDEMO.SALES_AV TO AV_USER3;
- 24. TH TechnologyTH Technology AVObjects • ATTRIBUTE DIMENSION • Specifies Data Source, Attributes, Levels • HIERARCHY • Organizes Dimensions Hierarchically Order • ANALYTIC VIEW • Aggregations, Calculations, Joins of Fact Data Specified by Attr. Dims, Hierarchies and Measures Facts and Calcs
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- 27. TH TechnologyTH Technology AttributeDimensions • SH Time • Base Calendar Year query • Base Fiscal Year query • These will be combined into one Attr Dimension
- 28. TH Technology Sample TimeAttr Dimension
- 29. TH TechnologyTH Technology NowAdd CLASSIFICATION
- 30. TH TechnologyTH Technology NowAdd CLASSIFICATION …
- 31. TH TechnologyTH Technology CLASSIFICATIONS •Metadata (Documentation) • Dimensions – Hierarchies – Avs – Members – Attributes - Measures • Caption • Description • Format_string • Shortcut Syntax for caption and description
- 32. TH TechnologyTH Technology Hierarchies •Reference an Attribute Dimension • Organize Dimension Values into Hierarchies
- 33. TH TechnologyTH Technology SHHierarchies • Time • Products • Customers • Channels • Promotions
- 34. TH TechnologyTH Technology AnalyticView DDL Format CREATE OR REPLACE ANALYTIC VIEW <name> <classification caption and description> USING <fact table> DIMENSION BY ( <list of dimension refs> ) HIERARCHIES ( <list of hierarchy references> ) MEASURES ( <list of measures> ) DEFAULT MEASURE … ;
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- 36. TH TechnologyTH Technology AnalyticView – Parts Recap • USING – Fact Table – Where to start • DIMENSION BY – What Dimensions Queries on the AV Will Use • HIERARCHY – Which Hierarchies Queries Will Use • MEASURES – Calculations: Sum, LEAD, LAG, Combinations – What Calculations Are Needed • CLASSIFICATION – Metadata - the Documentation • Usually On AV and Measures
- 37. TH TechnologyTH Technology Measures– Time Series LAG 1 … ACROSS ANCESTOR AT LEVEL YEAR Previous Year AVG(sales) … BETWEEN 11 PRECEDING AND CURRENT MEMBER 12 Month Period See LiveSQL Creating Time Series Calculations in Analytic Views
- 38. TH TechnologyTH Technology AVsw Materialized Views • Query Rewrite on MVs == Performance Gain • CACHE
- 39. TH TechnologyTH Technology AVsw In Memory • Base Tables In-Memory ➔ Greater Performance Gain
- 40. TH TechnologyTH Technology ValidatingAnalytic Views • DBMS_HIERARCHY • VALIDATE_HIERARCHY • VALIDATE_ANALYTIC_VIEW • VALIDATE_CHECK_SUCCESS • CREATE_VALIDATE_LOG_TABLE https://docs.oracle.com/en/database/oracle/oracle- database/12.2/dwhsg/overview-analytic-views.html#GUID- 73BE6787-3590-46FB-86F0-D402C244A687
- 41. TH TechnologyTH Technology Howit Works
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- 43. TH TechnologyTH Technology QueriesAgainst Analytic Views • Simple • Add Calculated Measures • Combine Fact and Calculated Measure • SHARE_OF • Drills
- 44. TH TechnologyTH Technology QueryAnalytic View - Simple
- 45. TH TechnologyTH Technology QueryAV + Calculated Measure
- 46. TH TechnologyTH Technology QueryAV – Specifics in WHERE
- 47. TH TechnologyTH Technology Drill– Change LEVEL in WHERE • Change LEVEL in WHERE
- 48. TH TechnologyTH Technology Drill– Change LEVEL in WHERE
- 49. TH TechnologyTH Technology SQLDeveloper Quick-Start • SQL Dev 18.1+ • Oracle 12.2+ Amazing!
- 50. TH TechnologyTH Technology AnalyticView Data Viewer
- 51. TH Technology Analytic Views: to Build Why~ When ~ Where
- 52. TH TechnologyTH Technology UseAnalytic Views For … • Data Warehousing • Extend Star Schema, Dimension • BI Reporting Systems • Data Visualization • Data Analysts • “BI Lite” Any Dimensional, Hierarchical Queries Easier, Faster
- 53. TH Technology Analytic Views inAPEX Quick Demo – “BI Lite” In APEX
- 54. TH TechnologyTH Technology TransitioningYour Data • KNOW YOUR DATA • PLAN • Star Schema, Constraints • Dimensions • Hierarchies • Let SQL Developer Help • Test, Timing, Test, Test
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- 56. TH TechnologyTH Technology AnalyticViews • Simpler SQL for Analytic Queries • Best Performance Gain over Star Schema, In Memory • SQL Dev QuickStart • Faster Route to Data Viz, BI, “BI-Lite” Implementations
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- 58. TH Technology Comments? Questions? Thank You EvaluationsPlease! Karen Cannell kcannell@thtechnology.com
- 59. TH TechnologyTH Technology Resources •Analytic Views LiveSQL Demos https://livesql.oracle.com/apex/livesql/file/tutorial_EDVE861IID1QUD1NIUPU5ALEW.html • Analytic Views in SH Sample Schema https://livesql.oracle.com/apex/livesql/file/tutorial_EDVE861IJ168OTUP6ZZ 01MX84.html • Analytic View Support in SQL Developer https://www.thatjeffsmith.com/archive/2017/03/oracle-database-12c-release-2- analytic-views-sql-developer/ • Using Analytic Views http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/12c/r2/Analyti cViews/UsingAVs.html#overview
- 60. TH TechnologyTH Technology AnalyticViews • “Hierarchical / Dimensional Model Over the Dimension and Fact Tables of a Star Schema …” • Best Performance • Star Schema, In Memory • W MViews, MViews In Memory
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