单选题Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE Which UPDATE statement is valid?()AUPDATE employees SET first_name = 'John' SET last_name ='Smith' WHERE employee_id = 180;BUPDATE employees SET first_name = 'John', SET last_name ='Smith' WHERE employee_id = 180;CUPDATE employees SET first_name = 'John' AND last_name ='Smith' WHERE employee_id = 180;DUPDATE employees SET first_name = 'John', last_name ='Smith' WHERE employee_id = 180;

单选题
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE Which UPDATE statement is valid?()
A

UPDATE employees SET first_name = 'John' SET last_name ='Smith' WHERE employee_id = 180;

B

UPDATE employees SET first_name = 'John', SET last_name ='Smith' WHERE employee_id = 180;

C

UPDATE employees SET first_name = 'John' AND last_name ='Smith' WHERE employee_id = 180;

D

UPDATE employees SET first_name = 'John', last_name ='Smith' WHERE employee_id = 180;


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