【单选题】
Examine the description of the CUSTOMERS table:<br /> CUSTOMER_ID NUMBER(4) NOT NULL<br /> CUSTOMER_NAME VARCHAR2(100) NOT NULL<br /> STREET_ADDRESS VARCHAR2(150)<br /> CITY_ADDRESS VARCHAR2(50)<br /> STATE_ADDRESS VARCHAR2(50)<br /> PROVINCE_ADDRESS VARCHAR2(50)<br /> COUNTRY_ADDRESS VARCHAR2(50)<br /> POSTAL_CODE VARCHAR2(12)<br /> CUSTOMER_PHONE VARCHAR2(20)<br /> The CUSTOMER_ID column is the primary key for the table.<br /> Which statement returns the city address and the number of customers in the cities Los Angeles or San Francisco?（）<br />
A、SELECT city_address, COUNT(*) FROM customers WHERE city_address IN ('Los Angeles', 'San Francisco');
B、SELECT city_address, COUNT(*) FROM customers WHERE city_address IN ('Los Angeles', 'San Francisco') GROUP BY city_address;
C、SELECT city_address, COUNT(customer_id) FROM customers WHERE city_address IN ('Los Angeles', 'San Francisco') GROUP BY city_address, customer_id;
D、SELECT city_address, COUNT(customer_id) FROM customers GROUP BY city_address IN ('Los Angeles', 'San Francisco');
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