编写程序，a)向"student"表中填入若干数据记录；b)在"student"表中分别查询所有记录以及满足条件"age>18"的记录。c)编程创建学生成绩表，并进行数据插入、修改、删除、查询和成绩统计等操作。(Write programs, a) fill in a number of data records in the "student" table; b) query all records in the "student" table and record the conditions "age>18". C) the program creates the student achievement table, and carries on the operation of data insertion, modification, deletion, query and achievement statistics.)