What is OLAP -Data Warehouse Concepts - IT Online Training @ Newyorksys

What Is OLAP? ,[object Object],[object Object],[object Object],[object Object],[object Object]

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The OLAP Market ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Strengths of OLAP ,[object Object],[object Object],[object Object],[object Object],[object Object]

OLAP Is FASMI ,[object Object],[object Object],[object Object],[object Object],[object Object]

Multi-dimensional Data ,[object Object],Dimensions: Product, Region, Time Hierarchical summarization paths Product Region Time Industry Country Year Category Region Quarter Product City Month Week Office Day Month 1 2 3 4 7 6 5 Product Toothpaste Juice Cola Milk Cream Soap Region W S N

Data Cube Lattice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Visual Operation: Pivot (Rotate) 10 47 30 12 Juice Cola Milk Cream NY LA SF 3/1 3/2 3/3 3/4 Date Month Region Product

“ Slicing and Dicing” Product Sales Channel Regions Retail Direct Special Household Telecomm Video Audio India Far East Europe The Telecomm Slice

Roll-up and Drill Down ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Roll Up Higher Level of Aggregation Low-level Details Drill-Down

Nature of OLAP Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Organizationally Structured Data ,[object Object],marketing manufacturing sales finance

Multidimensional Spreadsheets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OLAP - Data Cube ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL Extensions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Relational OLAP: 3 Tier DSS Store atomic data in industry standard RDBMS. Generate SQL execution plans in the ROLAP engine to obtain OLAP functionality. Obtain multi-dimensional reports from the DSS Client. Data Warehouse ROLAP Engine Decision Support Client Database Layer Application Logic Layer Presentation Layer

MD-OLAP: 2 Tier DSS MDDB Engine MDDB Engine Decision Support Client Database Layer Application Logic Layer Presentation Layer Store atomic data in a proprietary data structure (MDDB), pre-calculate as many outcomes as possible, obtain OLAP functionality via proprietary algorithms running against this data. Obtain multi-dimensional reports from the DSS Client.

Typical OLAP Problems Data Explosion Data Explosion Syndrome Number of Dimensions Number of Aggregations (4 levels in each dimension) Microsoft TechEd’98

Metadata Repository ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Metdata Repository .. 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Recipe for a Successful Warehouse

For a Successful Warehouse ,[object Object],[object Object],[object Object],[object Object]

Data Warehouse Pitfalls ,[object Object],[object Object],[object Object],[object Object],[object Object]

DW and OLAP Research Issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

DW and OLAP Research Issues .. 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is OLAP -Data Warehouse Concepts - IT Online Training @ Newyorksys

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