MySQL 字符集问题
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同一个 MySQL ，my.cnf 中配置了
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
执行以下 SQL
show variables like '%char%';
show variables like 'collation%';
MySQL cli 查询结果
Variable_name Value
character_set_client utf8
character_set_connection utf8
character_set_database utf8
character_set_filesystem binary
character_set_results utf8
character_set_server utf8
character_set_system utf8
character_sets_dir /usr/share/mysql/charsets/
Variable_name Value
collation_connection utf8_general_ci
collation_database utf8_general_ci
collation_server utf8_general_ci
navicat 、navicat 命令行、datagrip 结果
Variable_name Value
character_set_client utf8mb4
character_set_connection utf8mb4
character_set_database utf8
character_set_filesystem binary
character_set_results utf8mb4
character_set_server utf8
character_set_system utf8
character_sets_dir /usr/local/mysql/share/charsets/
Variable_name Value
collation_connection utf8mb4_general_ci
collation_database utf8_general_ci
collation_server utf8_general_ci
为何结果不同
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