Tableau Desktop Specialist Flashcards

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Connecting and Preparing Data

Question

What is the difference between a Live Connection and a Tableau Extract in Tableau?

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Connecting and Preparing Data

Answer

**Live Connection**: Queries the source database on every view render — always current, but as fast as the database. **Tableau Extract (.hyper file)**: A local columnar snapshot — extremely fast to query, works offline, but reflects data only as of the last refresh. **Use live when**: Real-time accuracy is critical. **Use extract when**: Performance matters more than real-time freshness.

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