SELECT T1.City_Town FROM Addresses AS T1 JOIN Customers AS T2 ON T1.Address_ID = T2.Address_ID EXCEPT SELECT T1.City_Town FROM Addresses AS T1 JOIN Performers AS T2 ON T1.Address_ID = T2.Address_ID
Tunjukkan semua kota di mana setidaknya satu pelanggan tinggal tetapi tidak ada pemain yang tinggal.
CREATE TABLE Customers (Address_ID VARCHAR); CREATE TABLE Addresses (City_Town VARCHAR, Address_ID VARCHAR); CREATE TABLE Performers (Address_ID VARCHAR)