mysql字符编码问题

https://blog.csdn.net/hzw19920329/article/details/55670782?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase

https://blog.csdn.net/CSDN_SUSAN/article/details/97964233?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4.nonecase

show create table score;
ALTER TABLE TABLE_NAME CONVERT TO CHARACTER SET utf8mb4;
alter table score change score score varchar(50) character set utf8mb4;