This is not your father's OLAP - Oracle 12.2 Analytic Views are not just for BI or DW experts. Analytic Views offer “a fast and efficient way to create analytic queries of data stored in existing database tables and views”. They enable simpler SQL statements and improved performance for aggregate and calculation queries – a big advantage for any developer building BI-like reports for data warehouse, business intelligence or other data analysis purpose. Even if you never used Oracle OLAP and/or do not have OBIEE, if you create BI-like queries, Analytic Views deserve a look.

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Analytic Views
for Mortals:
Worth A Look?
When and Where
Karen Cannell
kcannell@thtechnology.com
TH Technology

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Analytical Views for Mortals …
• Oracle Analytical Views
• How to Build, How to Query
• Not Just for OLAP and BI

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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

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About You …
• Oracle Technology ?
• OLAP Users?
• APEX Users ?
• Why Are You Here?
Analytics …

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Agenda
• What Are Analytical Views
• How to Build
• How to Query
• Who ~ Why ~ When ~Where to Use
• Questions ~ Discussion

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Analytic
Views:
to BuildWhat ?

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Oracle Objects
• Table
• Data Storage in Rows/Columns
• View - Virtual Table,
• No Data Storage (Stored SQL Query)
• Materialized View
• Stored Query Results

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Analytic View
• No Data Storage
• Organize Data via Dimensional Model
• Navigation, Join, Aggregation,
Calculation Rules Built In
• Complex Object → Simpler Queries

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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
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Analytic
Views:
to BuildQuick
Example
Demo

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Slide per Bud Endress, Oct 2017

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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

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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

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Analytic
Views:
to BuildHow to
Build
Attr Dimensions
Hierarchies
Analytic Views

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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

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Data
• Example Sales History Schema
• Fact Tables:
• SALES, COSTS
• Dimension Tables:
• PRODUCTS, CUSTOMERS,
PROMONTIONS, TIMES

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Analytic View Objects
ATTRIBUTE DIMENSION
HIERARCHY
Simple SQL

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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

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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;

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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

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Attribute Dimensions
• SH Time
• Base Calendar Year query
• Base Fiscal Year query
• These will be combined into one
Attr Dimension

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Sample Time Attr Dimension

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Now Add CLASSIFICATION

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Now Add CLASSIFICATION …

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CLASSIFICATIONS
• Metadata (Documentation)
• Dimensions – Hierarchies – Avs – Members –
Attributes - Measures
• Caption
• Description
• Format_string
• Shortcut Syntax for caption and
description

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Hierarchies
• Reference an Attribute
Dimension
• Organize Dimension Values into
Hierarchies

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SH Hierarchies
• Time
• Products
• Customers
• Channels
• Promotions

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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 … ;

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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

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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

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AVs w Materialized Views
• Query Rewrite on MVs ==
Performance Gain
• CACHE

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AVs w In Memory
• Base Tables In-Memory ➔
Greater Performance Gain

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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

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How it Works

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Analytic
Views:
to Build
How to
Query

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Queries Against Analytic Views
• Simple
• Add Calculated Measures
• Combine Fact and Calculated
Measure
• SHARE_OF
• Drills

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Query Analytic View - Simple

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Query AV + Calculated Measure

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Query AV – Specifics in WHERE

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Drill – Change LEVEL in WHERE
• Change LEVEL in WHERE

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Drill – Change LEVEL in WHERE

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SQL Developer Quick-Start
• SQL Dev 18.1+
• Oracle 12.2+
Amazing!

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Analytic View Data Viewer

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Analytic
Views:
to Build
Why ~
When ~
Where

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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

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Analytic Views
in APEX
Quick Demo – “BI Lite” In APEX

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Transitioning Your Data
• KNOW YOUR DATA
• PLAN
• Star Schema, Constraints
• Dimensions
• Hierarchies
• Let SQL Developer Help
• Test, Timing, Test, Test

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Analytic
Views:
Wrapup
to Build
Questions
Discussion

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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

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Comments?
Questions?
Thank You
Evaluations Please!
Karen Cannell
kcannell@thtechnology.com

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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

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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

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