What is maximum, minimum and average amount of outstanding of customer?
SELECT max(amount_outstanding) ,  min(amount_outstanding) ,  avg(amount_outstanding) FROM Customers;
SELECT max(amount_outstanding) ,  min(amount_outstanding) ,  avg(amount_outstanding) FROM Customers;
[{'max(amount_outstanding)': 9500.0, 'min(amount_outstanding)': 255.0, 'avg(amount_outstanding)': 5643.733333333334}]