https://www.cnblogs.com/charles1ee/p/7210092.html
https://blog.csdn.net/u014044812/article/details/48394271
表的字符集修改
https://blog.csdn.net/qq_27632921/article/details/84031078
mairadb 修改字符集
原文：https://www.cnblogs.com/gylong/p/12725000.html
