Workflow: Journey Builder> Automation Studio> New Automation Enter Query: Drag and drop Schedule in Start with a Starting Source and the SQL Query> Choose Query> Create New Query Activity> Name your file and add your query (Field name thats part of the DE you create separately- Example: FirstName, LastName, Subscriber Key) Create a new DE in Email Studio with the query field> Select The test DE which was created: Select Target DE and Save & Run Workflow: Select All Activities and Run Workflow: Activity Details: Run Completed with updated DE Edit/ add another query: Copy Source DE and create a new DE with same fields that we are running in SQL: Run the updated SQL Query added Activity and DE updated with Records: Completed Status: Received error: When the Query field and the DE created field does not match When an existing Query is being run, if we try to run another query Fixed the error by matching same field Waiting for existing query to complete