Create a name for his initials database,
Him, for example, to create a database called nmy
2, under the database created called name first character _stu watch
Him to create the table name: nmy_stu
Contains field: num (int) stuname (varchar) sex (varchar) age (int)
3, add three lines of data in the table
Custom
4, the implementation of all the query conditions and custom query (all data query age of 18)
5, update the data (all the age of 18, a student age changed to 19)
6, delete
A freshman, had just begun to learn, can't, can't understand