data warehousing
DESCRIPTION
Data organizationTRANSCRIPT
-
Data Warehouse
from one more angle
Data Warehouse
from one more angle
Raju Gowda
-
Scope Data Warehouse a relational
database guy perspective. For individuals with no/basic
knowledge of DW Basic terms of DW Who does what in DW
2
-
Data, Data, Data and BI
Operational Database (OLTP and ODS)
DW Database OLAP Database BI Information
3
-
Enterprise Data Warehouseing
Enterprise Data Warehouse Datamarts Bottom-up Approach Top-Down Approach Inmon or Kimball or Hybrid
4
-
Data WarehousePeople Involved:
- Project Manager- Data Warehouse Architect- Database Administrator- OLAP Architect- Internet/Intranet Architect- Business Analyst (BI Analyst)- Source Analyst- ETL Programmer- MDX Programmer- Web/Java/ASP/XML/XSL Developer
5
-
Data Warehouse Fact tables Dimension Tables Star-Schema Snow-Flake-Schema
6
-
Star-Schema
7
-
Snow-Flake-Schema
8
-
Star-Schema
9
-
Database Database
Database
Source 1
Source .. N
Source 4
Source 3
Source 2
+
20 %
20 %
20 %20 %
20 %
12
34
5
SourceAnalysis
CubeDesign
BI Front-EndApplication
Design
ETL Design
Star-Schema Design
Data Warehouse Architect
Data WarehouseProject Manager
10
-
Database Database
Database
Source 1
Source .. N
Source 4
Source 3
Source 2
+
20 %
20 %
20 %20 %
20 %
12
34
5
Star-Schema DesignMeasures and their Granularity
SourceAnalysis
BI User RequirementsCube Requirements
Dimensionality
Frequency of loading
Modifications/updates to the Measures
Modifications/updates to the Dimensions
DW Database
11
-
DatabaseDatabase
Database
Source 1
Source .. N
Source 4
Source 3
Source 2
+
20 %
20 %
20 %20 %
20 %
12
34
5
Star-Schema DesignRemoving/Archiving of stale data
SourceAnalysis
BI User RequirementsCube Requirements
Number of fact tables
Fact views ? Calculations within views ?
Snowflake dimensions?
Indexes
DW Database
12
-
DatabaseDatabase
Database
Source 1
Source .. N
Source 4
Source 3
Source 2
+
20 %
20 %
20 %20 %
20 %
12
34
5
Cube Design
Design of Dimensions
StarSchema
AnalyticalRequirements
Design of Cubes
OLAP Database
13
-
BI Reporting Tools SQL2000 Reporting Services MS Analysis Services MicroStrategy Business Objects Cognos Essbase ProClarity OLAP Hub
14
-
Questions?
15
-
Thank You
16
ScopeData, Data, Data and BIEnterprise Data WarehouseingData WarehouseData WarehouseStar-SchemaSnow-Flake-SchemaStar-SchemaData WarehouseDW DatabaseDW DatabaseOLAP DatabaseBI Reporting ToolsQuestions?Thank You