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You could do this using Javascipt API, script attached in the blog: Tinkering with Data Refresh & Auto-Refresh « Tableau Tinkering and an alternative here: https://databoss.starschema.net/auto-refresh-tableau-dashboard-without-embedding/
Hope this helps you get started.
HI Sasha Hanna,
Thanks a lot for the reply !!
That worked for me to instantly refresh the dashboard, without manually refreshing from user side, pulling the data from DB.
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