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Databases & Data Warehouses

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1 Databases & Data Warehouses
Chapter 2 Databases & Data Warehouses Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

2 Fig. 2.1. An excerpt from an ER schema for a university application
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

3 Fig. 2.2. A relational schema that corresponds to the schema of Fig. 1.1
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

4 Fig. 2.3. Examples of relations that are not normalized
(b) (c) (d) Fig Examples of relations that are not normalized Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

5 Fig. 2.4. Types for the SQL:2003 schema corresponding to the ER schema of Fig. 2.1
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

6 Fig A three-dimensional cube for sales data having dimensions Store, Time, and Product, and a measure amount Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

7 Fig. 2.6. Members for a hierarchy for the Store dimension
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

8 Fig. 2.7. Members of a parent-child hierarchy for the Employee dimension
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

9 (b) Roll-up to the Country level (c) Drill-down to the Month level
(a) Original cube (b) Roll-up to the Country level (c) Drill-down to the Month level (f) Dice on Store.Country='France' and Time.Quarter= 'Q1' or 'Q2' (e) Slice on Store.City='Paris' (d) Pivot Fig OLAP operations Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

10 Fig. 2.9. Example of a star schema
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

11 Fig. 2.10. Example of a snowflake schema
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

12 Fig. 2.11. Example of a constellation schema
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

13 Fig. 2.12 Typical data warehouse architecture
Copyright © 2008 Elzbieta Malinowski & Esteban Zimányi

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