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utf8_unicode_ci

MySQL

全角と半角を区別する

create table test (
  id int PRIMARY KEY ,
  name varchar(255) COLLATE utf8_unicode_ci,
  title varchar(255)
);
INSERT INTO test(id, name, title) 
VALUES (1, 'abc', 'abc'),(2, 'ABC', 'ABC'),(3, 'ABC', 'ABC');

結果

mysql> SELECT * from test where name ='abc';
+----+-----------+-----------+
| id | name      | title     |
+----+-----------+-----------+
|  1 | abc       | abc       |
|  2 | ABC       | ABC       |
|  3 | ABC    | ABC    |
+----+-----------+-----------+
3 rows in set (0.01 sec)

mysql> SELECT * from test where title ='abc';
+----+------+-------+
| id | name | title |
+----+------+-------+
|  1 | abc  | abc   |
|  2 | ABC  | ABC   |
+----+------+-------+
2 rows in set (0.01 sec)