mysql

http://blog.csdn.net/qq_30507287/article/details/53857451

http://www.runoob.com/mysql/mysql-install.html

http://www.cnblogs.com/mr-wid/archive/2013/05/09/3068229.html

https://www.w3cschool.cn/mysql/

http://www.cnblogs.com/mr-wid/archive/2013/05/09/3068229.html

http://www.runoob.com/mysql/mysql-create-tables.html

http://www.runoob.com/mysql/mysql-tutorial.html

https://www.shiyanlou.com/courses/