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Oracle认证考试

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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;
正确答案:D
答案解析:
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