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What is a data warehouse and why would you want one? Emily

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Presentation on theme: "What is a data warehouse and why would you want one? Emily"— Presentation transcript:

1 What is a data warehouse and why would you want one? Emily

2 Data warehouse Not for users Not operational or transactional Abstract/summary Normalized For analysis and strategy

3 ETL: Extract, transform, load Correct granularity Ensure privacy Enforce consistency Examples: ◦ Holds data store ◦ Checkout summary ◦ Chat logs Operations data e.g. ILS ETL MAGIC Data warehouse

4 Bridge silos ILS + demographics ◦ How much do Millennials use the library in comparison to their population in Seattle? EZproxy + academic department + publications ◦ How much do faculty access articles through the library by department? How does that correspond to the department’s publishing output? Events+ e-materials ◦ Do people who check out e-materials come to events as much as people who check out print materials?

5 Challenges Data problems that are unrelated Metrics that no one cares about Force people to agree on methods

6 Wins Save time Let people do their own reporting More accurate Shared strategy


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