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28、请选择最佳答案。

查看EMPLOYEES表的说明:

Name     Null?     Type

-------- ------- -------

EMPLOYEE_ID   NOT NULL     NUMBER(38)

SALARY   NOT NULL     NUMBER(38)

DEPARTMENT_ID   NOT NULL     NUMBER(38)

哪一条语句会将每个员工的SALARY增加其DEPARTMENT_ID的最低SALARY?

A) UPDATE employees e1

SET salary =

(SELECT e2.salary + MIN (e2.salary)

FROM employees e2

WHERE e1.department_id = e2.department_id

GROUP BY e2.department_id) ;

B) UPDATE employees e1

SET salary =

(SELECT e1.salary + MIN (e2.salary)

FROM employees e2

WHERE e1. department_id = e2.department_id) ;

C) UPDATE employees e1

SET salary = salary +

(SELECT MIN(e1.salary)

FROM employees e2

WHERE e1.department_id = e2.department_id) ;

D) UPDATE employees e1

SET salary = salary +

(SELECT MIN(salary)

FROM employees e2) ;