Examine the structure of the EMPLOYEES table:EMPLOYEE_ID NUMBER Primary KeyFIRST_NAME VARCHAR2(25)LAST_NAME VARCHAR2(25)HIRE_DATE DATEWhich UPDATE statement is valid?（）

单项选择题机床采用NC控制的根本目的是解决

单项选择题The STUDENT_GRADES table has these columnsSTUDENT_ID NUMBER(12)SEMESTER_END DATEGPA NUMBER(4,3)Which statement finds students who have a grade point average (GPA) greater than 3.0 for the calendar year 2001?（）A.SELECT student_id, gpa FROM student_grades WHERE semester_end BETWEEN ‘01-JAN-2001‘ AND ‘31-DEC-2001‘ OR gpa > 3.;B.SELECT student_id, gpa FROM student_grades WHERE semester_end BETWEEN ‘01-JAN-2001‘ AND ‘31-DEC-2001‘ AND gpa gt 3.0;C.SELECT student_id, gpa FROM student_grades WHERE semester_end BETWEEN ‘01-JAN-2001‘ AND ‘31-DEC-2001‘ AND gpa > 3.0;D.SELECT student_id, gpa FROM student_grades WHERE semester_end > ‘01-JAN-2001‘ OR semester_end < ‘31-DEC-2001‘ AND gpa >=s 3.0;