mysql – 表中的字符集编码

我有以下数据：Trollhättan

>如果我打印并将标题设置为utf-8,那么这是浏览器中的输出.
>如果我没有在标题中设置utf-8,Trollhättan.但是,当我将数据存储在数据库中并通过phpmyadmin检查时,我得到以下字符串：Trollhättan.
>当我设置标题为utf-8时,我得到了这个字符串：Trollhättan旁边的Trollhättan.

由于该表是latin1_swedish_ci,我是否必须在表UTF-8中使用？

解决方法:

以下是UTF-8下的排序规则列表

mysql> select * from information_schema.collations where CHARACTER_SET_NAME = 'utf8';
+--------------------+--------------------+-----+------------+-------------+---------+
| COLLATION_NAME     | CHARACTER_SET_NAME | ID  | IS_DEFAULT | IS_COMPILED | SORTLEN |
+--------------------+--------------------+-----+------------+-------------+---------+
| utf8_general_ci    | utf8               |  33 | Yes        | Yes         |       1 |
| utf8_bin           | utf8               |  83 |            | Yes         |       1 |
| utf8_unicode_ci    | utf8               | 192 |            | Yes         |       8 |
| utf8_icelandic_ci  | utf8               | 193 |            | Yes         |       8 |
| utf8_latvian_ci    | utf8               | 194 |            | Yes         |       8 |
| utf8_romanian_ci   | utf8               | 195 |            | Yes         |       8 |
| utf8_slovenian_ci  | utf8               | 196 |            | Yes         |       8 |
| utf8_polish_ci     | utf8               | 197 |            | Yes         |       8 |
| utf8_estonian_ci   | utf8               | 198 |            | Yes         |       8 |
| utf8_spanish_ci    | utf8               | 199 |            | Yes         |       8 |
| utf8_swedish_ci    | utf8               | 200 |            | Yes         |       8 |
| utf8_turkish_ci    | utf8               | 201 |            | Yes         |       8 |
| utf8_czech_ci      | utf8               | 202 |            | Yes         |       8 |
| utf8_danish_ci     | utf8               | 203 |            | Yes         |       8 |
| utf8_lithuanian_ci | utf8               | 204 |            | Yes         |       8 |
| utf8_slovak_ci     | utf8               | 205 |            | Yes         |       8 |
| utf8_spanish2_ci   | utf8               | 206 |            | Yes         |       8 |
| utf8_roman_ci      | utf8               | 207 |            | Yes         |       8 |
| utf8_persian_ci    | utf8               | 208 |            | Yes         |       8 |
| utf8_esperanto_ci  | utf8               | 209 |            | Yes         |       8 |
| utf8_hungarian_ci  | utf8               | 210 |            | Yes         |       8 |
| utf8_sinhala_ci    | utf8               | 211 |            | Yes         |       8 |
+--------------------+--------------------+-----+------------+-------------+---------+
22 rows in set (0.03 sec)

latin1_swedish_ci属于latin1

mysql> select * from information_schema.collations where COLLATION_NAME = 'latin1_swedish_ci';
+-------------------+--------------------+----+------------+-------------+---------+
| COLLATION_NAME    | CHARACTER_SET_NAME | ID | IS_DEFAULT | IS_COMPILED | SORTLEN |
+-------------------+--------------------+----+------------+-------------+---------+
| latin1_swedish_ci | latin1             |  8 | Yes        | Yes         |       1 |
+-------------------+--------------------+----+------------+-------------+---------+
1 row in set (0.03 sec)

排序规则最接近的utf8是ID 200

mysql> select * from information_schema.collations where ID = 200;
+-----------------+--------------------+-----+------------+-------------+---------+
| COLLATION_NAME  | CHARACTER_SET_NAME | ID  | IS_DEFAULT | IS_COMPILED | SORTLEN |
+-----------------+--------------------+-----+------------+-------------+---------+
| utf8_swedish_ci | utf8               | 200 |            | Yes         |       8 |
+-----------------+--------------------+-----+------------+-------------+---------+
1 row in set (0.00 sec)

警告

您可能需要尝试使用latin1,更改表中单个列的字符集和排序规则,或者两者都可能.至少,使用latin1在phpmyadmin中显示.

您可以调整并尝试使用ALTER DATABASE将整个数据库设置为特定字符集和排序规则.

ALTER DATABASE dbname CHARACTER SET utf8 COLLATE utf8_general_ci;

确保备份数据库并将其加载到dev / staging DB中,然后针对dev / staging运行ALTER DATABASE.

标签：mysql,character-set
来源： https://codeday.me/bug/20190806/1603797.html