单项选择题
The STUDENT_GRADES table has these columns:
STUDENT_ID NUMBER(12)
SEMESTER_END DATE
GPA NUMBER(4,3)
Which statement finds the highest grade point average (GPA) per semester?（）
A.SELECT MAX(gpa) FROM student_grades WHERE gpa IS NOT NULL;
B.SELECT (gpa) FROM student_grades GROUP BY semester_end WHERE gpa IS NOT NULL;
C.SELECT MAX(gpa) FROM student_grades WHERE gpa IS NOT NULL GROUP BY semester_end;
D.SELECT MAX(gpa) GROUP BY semester_end WHERE gpa IS NOT NULL FROM student_grades;
E.SELECT MAX(gpa) FROM student_grades GROUP BY semester_end WHERE gpa IS NOT NULL;
相关考题
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多项选择题
Which three are DATETIME data types that can be used when specifying column definitions? （）
A.TIMESTAMP
B.INTERVAL MONTH TO DAY
C.INTERVAL DAY TO SECOND
D.INTERVAL YEAR TO MONTH
E.TIMESTAMP WITH DATABASE TIMEZONE -
单项选择题
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; -
单项选择题
Examine the structure of the EMPLOYEES and DEPARTMENTS tables: EMPLOYEES EMPLOYEE_ID NUMBER DEPARTMENT_ID NUMBER MANAGER_ID NUMBER LAST_NAME VARCHAR2(25) DEPARTMENTS DEPARTMENT_ID NUMBER MANAGER_ID NUMBER DEPARTMENT_NAME VARCHAR2(35) LOCATION_ID NUMBER You want to create a report displaying employee last names, department names, and locations. Which query should you use?（）
A.SELECT e.last_name, d. department_name, d.location_id FROM employees e NATURAL JOIN departments D USING department_id ;
B.SELECT last_name, department_name, location_id FROM employees NATURAL JOIN departments WHERE e.department_id =d.department_id;
C.SELECT e.last_name, d.department_name, d.location_id FROM employees e NATURAL JOIN departments d;
D.SELECT e.last_name, d.department_name, d.location_id FROM employees e JOIN departments d USING (department_id );
