试题详情
- 多项选择题 The CUSTOMERS table has these columns: CUSTOMER_ID NUMBER(4) NOT NULL CUSTOMER_NAME VARCHAR2(100) NOT NULL STREET_ADDRESS VARCHAR2(150) CITY_ADDRESS VARCHAR2(50) STATE_ADDRESS VARCHAR2(50) PROVINCE_ADDRESS VARCHAR2(50) COUNTRY_ADDRESS VARCHAR2(50) POSTAL_CODE VARCHAR2(12) CUSTOMER_PHONE VARCHAR2(20) The CUSTOMER_ID column is the primary key for the table. Which two statements find the number of customers? （）
A、SELECT TOTAL(*) FROM customer;
B、SELECT COUNT(*) FROM customer;
C、SELECT TOTAL(customer_id) FROM customer;
D、SELECT COUNT(customer_id) FROM customer;
E、SELECT COUNT(customers) FROM customer;
F、SELECT TOTAL(customer_name) FROM customer;
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