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Description
Explain Live Connection
Real-Time Data: Tableau connects directly to your data source in real-time.
This means that any changes or updates to the data source are immediately reflected in your Tableau visualizations.
Latest Data: Live connections are ideal when you need the most up-to-date data available.
Databases that receive constant updates.
Performance: Excellent performance while working with small to medium-sized datasets. However, they may be slower when dealing with large or complex data because they require a constant connection to the data source.
Data Size: Do not impose any limitations on the size of the data you can work with, as the data remains in the source system.
Explain Extract Connection in Tableau
Snapshot of Data: We create a static snapshot or extract of the data from your data source. This extract is stored as a Tableau-specific file (.hyper) on your local machine or Tableau Server.
Performance Optimization: Extracts are designed to improve query performance, especially when dealing with large datasets.
Offline Access: Extracts allow you to work offline or in situations where a live connection is not possible, such as when the data source is remote or experiences downtime.
Data Size Considerations: While extracts can significantly improve performance, they do come with a limitation on the amount of data you can include in the extract. You can choose which data to include, apply filters, and aggregate as needed to manage the extract size.
Refresh Scheduling: Extracts can be set to refresh on a schedule, ensuring that your data is periodically updated without the need for manual intervention.
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