How many stations were installed on the date of 8/16/2013 and how many users on those stations are classified as a customer?
installed on refers to installation_date; installation_date = '8/16/2013'; customers refers to subscription_type = customers;
SELECT COUNT(T1.name) , SUM(CASE WHEN T2.subscription_type = 'Customer' THEN 1 ELSE 0 END) FROM station AS T1 INNER JOIN trip AS T2 ON T2.start_station_name = T1.name WHERE T1.installation_date = '8/16/2013' AND T2.subscription_type = 'Customer'