Importing database: Use mysql_version to avoid `Unknown collation: ' utf8mb4_0900_ai_ci'` · Issue #1902 · ddev/ddev · GitHub
Morgan Tocker on Twitter: "The graphs 4-6 show utf8mb4 performance with collations general and unicode. They show MariaDB as faster! But in MySQL the recommended (and default) collation for utf8mb4 is utf8mb4_0900_ai_ci.
MySQL/MariaDB - How to fix error "Unknown collation" and Migrate from MySQL to MariaDB database - YouTube
mysql - #1273 – Unknown collation: 'utf8mb4_unicode_520_ci' - Stack Overflow
MySQL: Character Sets, Unicode, and UCA compliant collations – lefred blog: tribulations of a MySQL Evangelist
ClearMyBug – Find the fix for your bug
MySQL 8.0.1 utf8mb4_0900_ai_ci의 한글 사용에 대한 문제점 - RastaLion's IT Blog