Question

我在考虑区分大小写的情况下尝试选择MySQL中的项目，但是我遇到了让MySQL执行任何区分的问题。

例如，以下所有陈述

mysql> SELECT * FROM mytable WHERE name="alpha";
mysql> SELECT * FROM mytable WHERE name="ALPHA";
mysql> SELECT * FROM mytable WHERE name="aLpHa";

返回相同的结果：

+----+-------+
| id | name  |
+----+-------+
| 1  | alpha |
+----+-------+
1 row in set (0.00 sec)

我认识到MySQL中的一些字符集和排序规则并不区分大小写，因此从默认位置更改字符集和排序规则是必要的步骤。我分别尝试changing and converting the table's character set and collate到utf8和utf8_unicode_ci，但我不确定它是否正常工作。

mysql> SHOW TABLE STATUS;
+---------+--------+---------+------------+-------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
| Name    | Engine | Version | Row_format | Rows  | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free | Auto_increment | Create_time         | Update_time | Check_time | Collation       | Checksum | Create_options | Comment |
+---------+--------+---------+------------+-------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
| mytable | InnoDB |      10 | Compact    | 68886 |             83 |     5783552 |               0 |      7372800 |  17825792 |          67039 | 2014-08-02 15:05:07 | NULL        | NULL       | utf8_unicode_ci |     NULL |                |         |
+---------+--------+---------+------------+-------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+-------------+------------+-----------------+----------+----------------+---------+
1 row in set (0.04 sec)
mysql> SHOW FULL COLUMNS FROM mytable;
+-------+-------------+-----------------+------+-----+---------+----------------+---------------------------------+---------+
| Field | Type        | Collation       | Null | Key | Default | Extra          | Privileges                      | Comment |
+-------+-------------+-----------------+------+-----+---------+----------------+---------------------------------+---------+
| id    | int(11)     | NULL            | NO   | PRI | NULL    | auto_increment | select,insert,update,references |         |
| name  | varchar(10) | utf8_unicode_ci | NO   |     | NULL    |                | select,insert,update,references |         |
+-------+-------------+-----------------+------+-----+---------+----------------+---------------------------------+---------+
2 rows in set (0.01 sec)

从上面可以看出，表的排序规则现已更改为utf8_unicode_ci，并且相关列的排序规则也已更改。

我需要执行任何额外的步骤，以便MySQL在字符大小写方面做出区分吗？我正在使用MySQL Server version: 5.5.37-0ubuntu0.13.10.1 (Ubuntu)。

请注意，我不能简单地使用BINARY关键字的查询，例如：

SELECT * FROM mytable WHERE BINARY name="alpha";

因为我实际上只是通过Django的ORM使用MySQL，据我所知，它不支持这种类型的查找。提前感谢您的帮助！

Answer 1

您可以使用选项：收集utf8_bin

实施例： http://sqlfiddle.com/#!2/60d73/1/0 与 http://sqlfiddle.com/#!2/60d73/2/0

您可以使用以下方式更改表格：

alter table mytable ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE utf8_bin;

MySQL SELECT语句不区分大小写

1 个答案: