Student数据库里面有个Grade表，该表里面存储了每个学生的学号，姓名，maths成绩，english成绩和computer成绩。现要查询Grade表，显示三门课都及格的学生学号、姓名、maths、english、computer字段，并按照学号升序排列。完成源程序DB.C中select2函数的编写。-Student database, which has a Grade table, which stores inside the school for each student number, name, maths scores, english results and computer results. Grade is to query the table to show all three classes of students passed the student number, name, maths, english, computer field, and in accordance with the student number in ascending order. Complete source DB.C select2 function in the preparation.