title: Airflow: How to run same query on multiple databases
body: <p>I need to execute a SQL query on multiple databases (10K) with the same schema and insert the results into a separate host using airflow.</p>
  
  <p>Do you have any idea how I should design my DAG in the most efficient way for this kind of project? </p>
  
  <p>Any help would be very appreciated!</p>