Utah Geek Events Big Mountain Data: Oracle Analytic Views: Worth It?
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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.
Utah Geek Events Big Mountain Data: Oracle Analytic Views: Worth It?
- 1. TH Technology Analytic Views for Mortals: Worth A Look? When and Where Karen Cannell kcannell@thtechnology.com TH Technology
- 2. Thanks to our Sponsors! Partners Premier Logo:
- 3. TH TechnologyTH Technology Analytical Views for Mortals … • Oracle Analytical Views • How to Build, How to Query • Not Just for OLAP and BI
- 4. TH TechnologyTH Technology About Me … • 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
- 6. TH TechnologyTH Technology About You … • 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
- 9. TH TechnologyTH Technology Oracle Objects • Table • Data Storage in Rows/Columns • View - Virtual Table, • No Data Storage (Stored SQL Query) • Materialized View • Stored Query Results
- 10. TH TechnologyTH Technology Analytic View • No Data Storage • Organize Data via Dimensional Model • Navigation, Join, Aggregation, Calculation Rules Built In • Complex Object → Simpler Queries
- 11. TH TechnologyTH Technology Analytic Views • 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
- 13. TH Technology Slide per Bud Endress, Oct 2017
- 14. TH TechnologyTH Technology Analytic Views • 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 Analytic Views • 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 BuildHow to 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
- 20. TH TechnologyTH Technology Analytic View Objects ATTRIBUTE DIMENSION HIERARCHY Simple SQL
- 22. TH TechnologyTH Technology System Privileges • 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 Object Privileges • 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 AV Objects • 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
- 27. TH TechnologyTH Technology Attribute Dimensions • SH Time • Base Calendar Year query • Base Fiscal Year query • These will be combined into one Attr Dimension
- 28. TH Technology Sample Time Attr Dimension
- 29. TH TechnologyTH Technology Now Add CLASSIFICATION
- 30. TH TechnologyTH Technology Now Add 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 SH Hierarchies • Time • Products • Customers • Channels • Promotions
- 34. TH TechnologyTH Technology Analytic View 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 … ;
- 36. TH TechnologyTH Technology Analytic View – 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 AVs w Materialized Views • Query Rewrite on MVs == Performance Gain • CACHE
- 39. TH TechnologyTH Technology AVs w In Memory • Base Tables In-Memory ➔ Greater Performance Gain
- 40. TH TechnologyTH Technology Validating Analytic 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 How it Works
- 42. TH Technology Analytic Views: to Build How to Query
- 43. TH TechnologyTH Technology Queries Against Analytic Views • Simple • Add Calculated Measures • Combine Fact and Calculated Measure • SHARE_OF • Drills
- 44. TH TechnologyTH Technology Query Analytic View - Simple
- 45. TH TechnologyTH Technology Query AV + Calculated Measure
- 46. TH TechnologyTH Technology Query AV – 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 SQL Developer Quick-Start • SQL Dev 18.1+ • Oracle 12.2+ Amazing!
- 50. TH TechnologyTH Technology Analytic View Data Viewer
- 51. TH Technology Analytic Views: to Build Why ~ When ~ Where
- 52. TH TechnologyTH Technology Use Analytic 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 in APEX Quick Demo – “BI Lite” In APEX
- 54. TH TechnologyTH Technology Transitioning Your Data • KNOW YOUR DATA • PLAN • Star Schema, Constraints • Dimensions • Hierarchies • Let SQL Developer Help • Test, Timing, Test, Test
- 56. TH TechnologyTH Technology Analytic Views • 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
- 58. TH Technology Comments? Questions? Thank You Evaluations Please! 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 Analytic Views • “Hierarchical / Dimensional Model Over the Dimension and Fact Tables of a Star Schema …” • Best Performance • Star Schema, In Memory • W MViews, MViews In Memory