utf8和utf8mb4区别 发表于 2022-07-15 mb4是指most byte 4，即用4个字节来存字符utf8在MySQL的实现里是用3个字节，无法支持emoji字符参考https://www.jianshu.com/p/2b8629af8000?u_atoken=edb621fc-3ed8-4abd-ad79-83120b8274f3&u_asession=01imGGZau59hUSA0lzJEfQGqUMfYLIHz0KsTbBTrFDVl0zDlhCSl0_GGrcqHADYKDkX0KNBwm7Lovlpxjd_P_q4JsKWYrT3W_NKPr8w6oU7K--ZZ5hTiDSZi2tREAmAWXlyuYfe7vWV-zsHJifFo5DumBkFo3NEHBv0PZUm6pbxQU&u_asig=058un4ynxXv3LVdcU4rcDeWLjjymFr2iVA3r4usPGEL2q1zg6_AaOC5kGurmR1VLUp5jMCoTeR2-93EFJtTFiYUf4wL9lwYbUZFoLO7eJ2A0RoAEyfnUh57misSICd6yqtxl9tSUnXLsI2NKVKGUFTfoDM42Tcgs8fGclWLop1Aw79JS7q8ZD7Xtz2Ly-b0kmuyAKRFSVJkkdwVUnyHAIJzfhu2lmqe57tmDa0VKuaDrDCfz6P6mNqjVXschHU8u5pfqft3yiexPr1Pj5ASov3mu3h9VXwMyh6PgyDIVSG1W_7Z-QUHDbMSTmHz3apT0KvSbYsM8OpgUlCxiCwc8zrjusj9HUqniv2DJuZJhi8CttOrXF14p9fXI8ocDy-BddWmWspDxyAEEo4kbsryBKb9Q&u_aref=7NVuBAugN7f7QVDLT9QF500sVQM%3D