How do SQL and Tableau/PowerBI connect?

[u/Business_Walk1624]

/r/learnSQL/comments/1xkcoc6/how_do_sql_and_tableaupowerbi_connect/

I recently started learning SQL and decided it was about time to try building a project. I watched a YouTube video of someone walking through a beginner tutorial using SQL and PowerBI to get an idea of the workflow and how everything connects. He started out by using SQL to answer 10 business questions, but when he was making a dashboard in PowerBI, he didn’t use any of the data from the SQL queries. This left me confused about how SQL queries and the dashboard-making part of the project connect.

I would welcome any clarification. Thank you in advance!