What mechanism does Tableau use to keep data current in published dashboards?

Tableau employs scheduled data extract refreshes to keep data current in published dashboards. This mechanism allows users to set specific intervals at which the data extracts are automatically updated, ensuring that the visualizations reflect the most recent data available from the data source.

Scheduled refreshes are particularly beneficial because they enable users to automate the process of data updates without needing to manually intervene each time new data becomes available. Through Tableau Server or Tableau Online, users can schedule these refreshes based on their needs, such as daily, weekly, or monthly intervals. This ensures that dashboards remain relevant and accurate in real-time scenarios, particularly for organizations that rely on timely data for decision-making.

In contrast, other options like manual updates require user intervention and do not maintain the freshness of data in an efficient manner. Data uploads every quarter may not address the need for more frequent updates, especially in dynamic business environments. Instant data synchronization is not a standard feature in Tableau for all data sources, as some sources require extracts and don't support real-time connections. Thus, utilizing scheduled data extract refreshes is the most effective and reliable way to maintain current data in published dashboards.