mysql

http://www.cnblogs.com/999-/p/6217846.html

http://www.cnblogs.com/999-/p/6269135.html

http://www.ynpxrz.com/n822738c2024.aspx

https://wenku.baidu.com/view/5c04e26baf1ffc4ffe47ac38.html

http://www.360doc.com/content/14/0101/03/5054188_341637143.shtml

https://wenku.baidu.com/view/4bf3bd8f763231126edb11c1.html