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Data warehouse architecture CIF, DM Bus Matrix Star schema

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Presentation on theme: "Data warehouse architecture CIF, DM Bus Matrix Star schema"— Presentation transcript:

1 Data warehouse architecture CIF, DM Bus Matrix Star schema
Topics / Techniques Data warehouse architecture CIF, DM Bus Matrix Star schema Conformed dimensions Conformed facts Dimensional vs Entity-Relationship March 2004 Ron McFadyen

2 Additive, non-additive, semi-additive PK FKs DD CD
Topics / Techniques Fact Factless Indicators Additive, non-additive, semi-additive PK FKs DD CD March 2004 Ron McFadyen

3 Transaction, Periodic Snapshot, Accumulating Snapshot
Topics / Techniques Fact Transaction, Periodic Snapshot, Accumulating Snapshot normalizing the fact table Density: dense / non-dense Currencies Allocating facts to a lower granularity fact table March 2004 Ron McFadyen

4 Snowflaking, Normalization Outrigger Mini dimension Audit Keyword Junk
Topics / Techniques Dimension: Snowflaking, Normalization Outrigger Mini dimension Audit Keyword Junk Role-playing March 2004 Ron McFadyen

5 Many-to-many relationships Bridge tables
Topics / Techniques Dimension: Many-to-many relationships Bridge tables Fixed-depth vs ragged hierarchies Slowly Changing Dimensions: Type 1, 2, 3, hybrid March 2004 Ron McFadyen

6 Natural key, surrogate key Intelligent/Smart key
Topics / Techniques Keys PK, FK Natural key, surrogate key Intelligent/Smart key March 2004 Ron McFadyen

7 Accessing multiple fact tables Many-to-one-to-many join Multi-pass SQL
Topics / Techniques Accessing multiple fact tables Many-to-one-to-many join Multi-pass SQL Drill across Drill down March 2004 Ron McFadyen

8 attributes: PK, weighting factors Banding tables non-equi join
Topics / Techniques Bridge tables: various applications attributes: PK, weighting factors Banding tables non-equi join Point-in-time balances nested SQL sequencing of SKs March 2004 Ron McFadyen

9 Topics / Techniques Aggregation: Shrunken Lost Collapsed Transparency
Performance March 2004 Ron McFadyen

10 Topics / Techniques Physical database Partitioning Bitmaps ETL
CDC techniques late-arriving rows March 2004 Ron McFadyen


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