我正在尝试使用 utf8mb4 字符集和 utf8mb4_unicode_ci 排序规则创建数据库。但是，我似乎无法将 unicode 字符插入到我的表中。
我做了什么:
SET NAMES utf8mb4;
CREATE DATABASE mydb CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
USE mydb;
CREATE TABLE test (val VARCHAR(16));
INSERT INTO test (val) VALUES ("á");
ERROR 1366 (22007): Incorrect string value: '\xA0' for column `mydb`.`test`.`val` at row 1
如果我不使用 SET NAMES utf8mb4;，那么我可以毫无问题地插入 "á" 字符。
这些是我的默认字符集变量:
show variables like 'char%'; show variables like 'collation%';
+--------------------------+-----------------------------------------------+
| Variable_name | Value |
+--------------------------+-----------------------------------------------+
| character_set_client | cp850 |
| character_set_connection | cp850 |
| character_set_database | utf8mb4 |
| character_set_filesystem | binary |
| character_set_results | cp850 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | C:\Program Files\MariaDB 10.5\share\charsets\ |
+--------------------------+-----------------------------------------------+
8 rows in set (0.000 sec)
+----------------------+--------------------+
| Variable_name | Value |
+----------------------+--------------------+
| collation_connection | cp850_general_ci |
| collation_database | utf8mb4_unicode_ci |
| collation_server | utf8_general_ci |
+----------------------+--------------------+
3 rows in set (0.000 sec)
使用SET NAMES后:
show variables like 'char%'; show variables like 'collation%';
+--------------------------+-----------------------------------------------+
| Variable_name | Value |
+--------------------------+-----------------------------------------------+
| character_set_client | utf8mb4 |
| character_set_connection | utf8mb4 |
| character_set_database | utf8mb4 |
| character_set_filesystem | binary |
| character_set_results | utf8mb4 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | C:\Program Files\MariaDB 10.5\share\charsets\ |
+--------------------------+-----------------------------------------------+
8 rows in set (0.000 sec)
+----------------------+--------------------+
| Variable_name | Value |
+----------------------+--------------------+
| collation_connection | utf8mb4_general_ci |
| collation_database | utf8mb4_unicode_ci |
| collation_server | utf8_general_ci |
+----------------------+--------------------+
3 rows in set (0.000 sec)
如何解决此问题以便可以在 utf8mb4 字符集中插入字符？
最佳答案
您的文本(或 .sql)文件本身采用 cp850 编码，而不是 utf-8。
您可以看到编码值是单个字节 - UTF-8 编码应至少为 2 个字节。
为了使用SET NAMES utf8mb4;命令，您的文件需要转换为utf-8。一些高级编辑器允许这样做，甚至 Windows 记事本在现代版本中也可以将文本文件保存为 utf-8。
关于mysql - MariaDB 使用 utf8mb4 时出现错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/68082339/