What are the names of the customers and staff members?
SELECT customer_details FROM customers UNION SELECT staff_details FROM staff
SELECT customer_details FROM customers UNION SELECT staff_details FROM staff
[{'Customer_Details': 'Alexander'}, {'Customer_Details': 'Allen'}, {'Customer_Details': 'America Jaskolski'}, {'Customer_Details': 'Augustine Kerluke'}, {'Customer_Details': 'Bo'}, {'Customer_Details': 'Buddy Marquardt'}, {'Customer_Details': 'Cathryn'}, {'Customer_Details': 'Clifton'}, {'Customer_Details': 'Dayana Robel'}, {'Customer_Details': 'Dr. Diana Rath'}, {'Customer_Details': 'Eladio'}, {'Customer_Details': 'Ellsworth Paucek'}, {'Customer_Details': 'Evans'}, {'Customer_Details': 'Gideon'}, {'Customer_Details': 'Julius'}, {'Customer_Details': 'Kaci'}, {'Customer_Details': 'Lauriane Ferry PhD'}, {'Customer_Details': 'Margaretta'}, {'Customer_Details': 'Maryse'}, {'Customer_Details': 'Miss Felicita Reichel'}, {'Customer_Details': 'Mr. Edwardo Blanda I'}, {'Customer_Details': 'Mr. Randal Lynch III'}, {'Customer_Details': 'Mrs. Hanna Willms'}, {'Customer_Details': 'Mrs. Lilly Graham III'}, {'Customer_Details': 'Mrs. Liza Heller V'}, {'Customer_Details': 'Roman'}, {'Customer_Details': 'Selena Gerhold'}, {'Customer_Details': 'Sydnie Friesen'}, {'Customer_Details': 'Vernie'}, {'Customer_Details': 'Zachery'}]