这个是关于mysql数据库的一些命令。。对于初学者来说是很重要的，，可以了解很多。对插入删除这些操作很红啊-This is some of the commands on the mysql database. . Is very important for beginners, can learn a lot. Insertion and deletion of these operations is very red

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 t