1. MySQLバージョン SELECT VERSION(); +-----------+ | VERSION() | +-----------+ | 8.0.20 | +-----------+ 2. デフォルトのCollation SHOW COLLATION WHERE COLLATION LIKE 'utf8mb4%' AND `default` = 'Yes'; +--------------------+---------+-----+---------+----------+---------+---------------+ | Collation | Charset | Id | Default | Compiled | Sortlen | Pad_attribute | +--------------------+---------+-----+---------+--