![MySQL: Why is that when creating a schema with collation utf8mb4_unicode_ci it becomes utf8mb4_0900_ai_ci - Stack Overflow MySQL: Why is that when creating a schema with collation utf8mb4_unicode_ci it becomes utf8mb4_0900_ai_ci - Stack Overflow](https://i.stack.imgur.com/efdri.png)
MySQL: Why is that when creating a schema with collation utf8mb4_unicode_ci it becomes utf8mb4_0900_ai_ci - Stack Overflow
![1273 - Unknown collation : 'utf8mb4_0900_ai_ci' | Issue Fixed | Database Import Issue | Solved - YouTube 1273 - Unknown collation : 'utf8mb4_0900_ai_ci' | Issue Fixed | Database Import Issue | Solved - YouTube](https://i.ytimg.com/vi/e3k9Awa3Z3s/hqdefault.jpg)
1273 - Unknown collation : 'utf8mb4_0900_ai_ci' | Issue Fixed | Database Import Issue | Solved - YouTube
![Jonathan Reinink on Twitter: "So, if you're using MySQL, and running into issues like this, consider using "utf8mb4_0900_ai_ci" instead of "utf8mb4_unicode_ci". You can read more about this on the MySQL blog: https://t.co/yD6aEYcpdG Jonathan Reinink on Twitter: "So, if you're using MySQL, and running into issues like this, consider using "utf8mb4_0900_ai_ci" instead of "utf8mb4_unicode_ci". You can read more about this on the MySQL blog: https://t.co/yD6aEYcpdG](https://pbs.twimg.com/media/EY9sjtDWoAEd6JB.jpg)
Jonathan Reinink on Twitter: "So, if you're using MySQL, and running into issues like this, consider using "utf8mb4_0900_ai_ci" instead of "utf8mb4_unicode_ci". You can read more about this on the MySQL blog: https://t.co/yD6aEYcpdG
![ERROR 1273 (HY000): Unknown collation: 'utf8mb4_0900_ai_ci'_jerry-89的博客-CSDN博客_error 1273 (hy000): unknown collation: 'utf8mb4_09 ERROR 1273 (HY000): Unknown collation: 'utf8mb4_0900_ai_ci'_jerry-89的博客-CSDN博客_error 1273 (hy000): unknown collation: 'utf8mb4_09](https://img-blog.csdnimg.cn/img_convert/063ce5dabf0f3198656118fe49b96c53.png)
ERROR 1273 (HY000): Unknown collation: 'utf8mb4_0900_ai_ci'_jerry-89的博客-CSDN博客_error 1273 (hy000): unknown collation: 'utf8mb4_09
![After migration to MySql 8 from 5.7 - Illegal mix of collations (utf8mb4_unicode_ci,IMPLICIT) and (utf8mb4_0900_ai_ci,IMPLICIT) for operation '=' - Stack Overflow After migration to MySql 8 from 5.7 - Illegal mix of collations (utf8mb4_unicode_ci,IMPLICIT) and (utf8mb4_0900_ai_ci,IMPLICIT) for operation '=' - Stack Overflow](https://i.stack.imgur.com/iyZ0R.png)