所以我的目标是将所有字符集和排序规则设置为utf8 and utf8_unicode_ci.
我使用 AWS RDS 来托管 MySQL 服务器。
Ive set the collation_connection variable to utf8_unicode_ci in the Parameter group for the RDS.
.
然后我重新启动了 RDS，当进入 MySQL 控制台时，它显示了以下变量值。
mysql> show variables like "%character%";show variables like "%collation%";
+--------------------------+-------------------------------------------+
| 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 | /rdsdbbin/mysql-5.6.22.R1/share/charsets/ |
+--------------------------+-------------------------------------------+
8 rows in set (0.01 sec)
+----------------------+-----------------+
| Variable_name | Value |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database | utf8_unicode_ci |
| collation_server | utf8_unicode_ci |
+----------------------+-----------------+
我不确定为什么collation_connection被设置为utf8_general_ci
您在此处看到的变量是当前客户端会话的变量：
+----------------------+-----------------+
| Variable_name | Value |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database | utf8_unicode_ci |
| collation_server | utf8_unicode_ci |
+----------------------+-----------------+
因此，当您启动连接时，您需要在要连接的客户端上运行以下命令：
SET collation_connection = 'utf8_unicode_ci';