小编Pet*_*Wal的帖子

在不指定字符集或排序规则的情况下创建数据库时，将使用服务器默认值（如预期）。

MariaDB [(none)]> SHOW VARIABLES LIKE '%_server' ;
+----------------------+--------------------+
| Variable_name        | Value              |
+----------------------+--------------------+
| character_set_server | utf8mb4            |
| collation_server     | utf8mb4_unicode_ci |
+----------------------+--------------------+

MariaDB [(none)]> CREATE DATABASE `test-without-charset` ;
MariaDB [(none)]> SELECT `DEFAULT_COLLATION_NAME` FROM `information_schema`.`SCHEMATA` WHERE `SCHEMA_NAME` LIKE 'test-without-charset';
+------------------------+
| DEFAULT_COLLATION_NAME |
+------------------------+
| utf8mb4_unicode_ci     |
+------------------------+

但是，在CREATE DATABASE-query 中指定字符集时，默认排序规则更改为utf8mb4_general_ci.

MariaDB [(none)]> CREATE DATABASE `test-with-charset` CHARACTER SET utf8mb4 ;
MariaDB [(none)]> SELECT `DEFAULT_COLLATION_NAME` FROM `information_schema`.`SCHEMATA` WHERE `SCHEMA_NAME` LIKE 'test-with-charset';
+------------------------+
| DEFAULT_COLLATION_NAME …