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 = 'Smoth' WHERE employee_id = 180;CUPDATE employee SET first_name = 'John' AND last_name = 'Smith' WHERE employee_id = 180;DUPDATE employee 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 = 'Smoth' WHERE employee_id = 180;
C
UPDATE employee SET first_name = 'John' AND last_name = 'Smith' WHERE employee_id = 180;
D
UPDATE employee SET first_name = 'John', last_name = 'Smith' WHERE employee_id = 180;
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