mysql 排序规则-权重

 

 

https://www.coder.work/article/147670

 

https://stackoverflow.com/questions/41147829/how-can-i-search-by-emoji-in-mysql-using-utf8mb4

 

https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-sets.html#charset-unicode-sets-general-versus-unicode