Mysql SELECT unicode 字符

Question

我有两个表:

单词表:

+----+-------+------+
| id | word  | lang |
+----+-------+------+
|  1 | uña   | es   |
|  2 | two   | en   |
|  3 | three | en   |
|  4 | four  | en   |
+----+-------+------+

stop_words 表:

+----+------+------+
| id | word | lang |
+----+------+------+
|  1 | una  | es   |
|  2 | one  | en   |
+----+------+------+

我需要从 words 表中选择一个单词，但该单词不在 stop_words 表中

• 如果我尝试以下查询，结果为空，因为 uña 来自 words 与 stop_words

  中的 una 匹配

  SELECT  *
  FROM words a WHERE word LIKE  'uñ%' AND lang = 'es'
  AND NOT EXISTS( Select *
      FROM stop_words as b WHERE a.word = b.word AND lang = 'es'
  

  )

• 如果我尝试使用 BINARY，结果似乎没问题但失败，如果不使用相同的大小写(例如:Uñ而是 uñ )

  SELECT  *
  FROM words a WHERE word LIKE BINARY 'Uñ%'  AND lang = 'es'
  AND NOT EXISTS( Select *
      FROM stop_words as b WHERE BINARY a.word = BINARY b.word AND lang = 'es'
  )
  

我使用 utf8mb4_unicode_ci 作为数据库、表和列。

知道如何解决这个问题吗？

Answer 1

SELECT id, word, lang 
FROM words 
WHERE BINARY word NOT IN (Select BINARY word FROM stop_words);

结果:

+----+-------+------+
| id | word  | lang |
+----+-------+------+
|  1 | uña   | es   |
|  2 | two   | en   |
|  3 | three | en   |
|  4 | four  | en   |
+----+-------+------+

对表使用 utf8_unicode_ci

编辑: 对于同样的情况

SELECT  id, word, lang 
FROM words 
WHERE BINARY LOWER(word) NOT IN (Select BINARY LOWER(word) FROM stop_words);