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id是什么?int能否为id?如何封装成id?
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Examine the structure of the STUDENTS table: STUDENT_ID NUMBER NOT NULL, Primary Key STUDENT_NAME VARCHAR2(30) COURSE_ID VARCHAR2(10) NOT NULL MARKS NUMBER START_DATE DATE FINISH_DATE DATE You need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999. Which SQL statement accomplishes this task? ()A、SELECT student_ id, marks, ROWNUM "Rank" FROM students WHERE ROWNUM = 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99 AND course_id = 'INT_SQL' ORDER BY mark DESC;B、SELECT student_id, marks, ROWID "Rank" FROM students WHERE ROWID = 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY mark;C、SELECT student_id, marks, ROWNUM "Rank" FROM (SELECT student_id, marks FROM students WHERE ROWNUM = 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC- 99' AND course_id = 'INT_SQL' ORDER BY mark DESC;D、SELECT student_id, marks, ROWNUM "Rank" FROM (SELECT student_id, marks FROM students WHERE (finish_date BETWEEN '01-JAN-99 AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY marks DESC) WHERE ROWNUM = 10;E、SELECT student id, marks, ROWNUM "Rank" FROM (SELECT student_id, marks FROM students ORDER BY marks) WHERE ROWNUM = 10 AND finish date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course _ id 'INT_SQL';
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单选题下列哪种方式可以在session中保存一个名为"name",值为"newer"的属性()A
request.getSession().setAttribute(“name”,newer)B
request.getSession().getAttribute(“ID”,id);C
request.getSession().setParameter(“ID”,id);D
request.getSession().getParameter(“ID”,id)
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单选题在VRP中,如何将路由器的RouterID配置为1.1.1.1().A
router id1.1.1.1B
[Quidway]router id1.1.1.1C
[Quidway]router-id1.1.1.1D
[Quidway]router id1.1.1.1255.255.255.255
考题
问答题id是什么?int能否为id?如何封装成id?
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