如何删除MySQL中的重音符号？

我刚刚编辑了一个100万个地名的数据库。我将在一个自动完成小部件中使用它来查找城市。很多地方都有口音。。。我希望在用户键入没有重音的名称时能够找到记录

---

为了做到这一点，我有一个第二列，其中有一个名字的未注副本。这些记录中有许多仍然是空白的，所以我想写一个查询来填充它们。这在直接MySQL中可能吗？如果是，如何比较？

如果为列设置了适当的排序规则，则字段中的值将与未注释的等效值进行比较

mysql> SET NAMES 'utf8' COLLATE 'utf8_unicode_ci';
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT 'é' = 'e';
+------------+
| 'é' = 'e' |
+------------+
|          1 |
+------------+
1 row in set (0.05 sec)

---

查看MySQL手册的

CONVERT（）

和

CAST（）

：

CONVERT（）提供了一种在不同字符集之间转换数据的方法。语法是：

CONVERT（使用转码名称进行expr）

---

我也遇到了同样的问题，所以我基于PHP脚本编写了一个查询列表，我必须删除重音符号并创建SEO友好的URL：

也许您想添加其他特殊字符，例如

$

或

符号

UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Š','S');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'š','s');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ð','Dj');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ž','Z');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ž','z');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'À','A');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Á','A');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Â','A');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ã','A');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ä','A');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Å','A');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Æ','A');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ç','C');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'È','E');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'É','E');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ê','E');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ë','E');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ì','I');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Í','I');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Î','I');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ï','I');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ñ','N');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ò','O');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ó','O');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ô','O');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Õ','O');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ö','O');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ø','O');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ù','U');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ú','U');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Û','U');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ü','U');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ý','Y');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Þ','B');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ß','Ss');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'à','a');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'á','a');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'â','a');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ã','a');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ä','a');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'å','a');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'æ','a');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ç','c');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'è','e');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'é','e');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ê','e');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ë','e');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ì','i');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'í','i');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'î','i');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ï','i');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ð','o');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ñ','n');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ò','o');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ó','o');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ô','o');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'õ','o');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ö','o');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ø','o');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ù','u');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ú','u');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'û','u');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ý','y');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ý','y');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'þ','b');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ÿ','y');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ƒ','f');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'.',' ');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,' ','-');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'--','-');

UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ě','e');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ž','z');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'š','s');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'č','c');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ř','r');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ď','d');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ť','t');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ň','n');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'ů','u');

UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ě','E');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ž','Z');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Š','S');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Č','C');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ř','R');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ď','D');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ť','T');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ň','N');
UPDATE TABLE_NAME SET COLUMN = REPLACE(COLUMN,'Ů','U');

UPDATE TABLE_NAME SET COLUMN = LOWER(COLUMN);

---

我与大家分享这一点，或许能有所帮助

DELIMITER //
CREATE OR REPLACE FUNCTION `remove_accents`(`str` TEXT)
    RETURNS text
    LANGUAGE SQL
    DETERMINISTIC
    NO SQL
    SQL SECURITY INVOKER
    COMMENT ''

BEGIN

    SET str = REPLACE(str,'Š','S');
    SET str = REPLACE(str,'š','s');
    SET str = REPLACE(str,'Ð','Dj');
    SET str = REPLACE(str,'Ž','Z');
    SET str = REPLACE(str,'ž','z');
    SET str = REPLACE(str,'À','A');
    SET str = REPLACE(str,'Á','A');
    SET str = REPLACE(str,'Â','A');
    SET str = REPLACE(str,'Ã','A');
    SET str = REPLACE(str,'Ä','A');
    SET str = REPLACE(str,'Å','A');
    SET str = REPLACE(str,'Æ','A');
    SET str = REPLACE(str,'Ç','C');
    SET str = REPLACE(str,'È','E');
    SET str = REPLACE(str,'É','E');
    SET str = REPLACE(str,'Ê','E');
    SET str = REPLACE(str,'Ë','E');
    SET str = REPLACE(str,'Ì','I');
    SET str = REPLACE(str,'Í','I');
    SET str = REPLACE(str,'Î','I');
    SET str = REPLACE(str,'Ï','I');
    SET str = REPLACE(str,'Ñ','N');
    SET str = REPLACE(str,'Ò','O');
    SET str = REPLACE(str,'Ó','O');
    SET str = REPLACE(str,'Ô','O');
    SET str = REPLACE(str,'Õ','O');
    SET str = REPLACE(str,'Ö','O');
    SET str = REPLACE(str,'Ø','O');
    SET str = REPLACE(str,'Ù','U');
    SET str = REPLACE(str,'Ú','U');
    SET str = REPLACE(str,'Û','U');
    SET str = REPLACE(str,'Ü','U');
    SET str = REPLACE(str,'Ý','Y');
    SET str = REPLACE(str,'Þ','B');
    SET str = REPLACE(str,'ß','Ss');
    SET str = REPLACE(str,'à','a');
    SET str = REPLACE(str,'á','a');
    SET str = REPLACE(str,'â','a');
    SET str = REPLACE(str,'ã','a');
    SET str = REPLACE(str,'ä','a');
    SET str = REPLACE(str,'å','a');
    SET str = REPLACE(str,'æ','a');
    SET str = REPLACE(str,'ç','c');
    SET str = REPLACE(str,'è','e');
    SET str = REPLACE(str,'é','e');
    SET str = REPLACE(str,'ê','e');
    SET str = REPLACE(str,'ë','e');
    SET str = REPLACE(str,'ì','i');
    SET str = REPLACE(str,'í','i');
    SET str = REPLACE(str,'î','i');
    SET str = REPLACE(str,'ï','i');
    SET str = REPLACE(str,'ð','o');
    SET str = REPLACE(str,'ñ','n');
    SET str = REPLACE(str,'ò','o');
    SET str = REPLACE(str,'ó','o');
    SET str = REPLACE(str,'ô','o');
    SET str = REPLACE(str,'õ','o');
    SET str = REPLACE(str,'ö','o');
    SET str = REPLACE(str,'ø','o');
    SET str = REPLACE(str,'ù','u');
    SET str = REPLACE(str,'ú','u');
    SET str = REPLACE(str,'û','u');
    SET str = REPLACE(str,'ý','y');
    SET str = REPLACE(str,'ý','y');
    SET str = REPLACE(str,'þ','b');
    SET str = REPLACE(str,'ÿ','y');
    SET str = REPLACE(str,'ƒ','f');


    RETURN str;
END
//
DELIMITER ;

drop函数（如果存在）fn\u remove\u重音符号；
分隔符|
创建函数fn_remove_重音符号（textvalue varchar（20000））
返回varchar（20000）
开始
设置@textvalue=textvalue；
--口音
设置重音符号；
设置@withoutaccents='SSZZAAAAAAAAACEEEIIINOOOOOUUYBAAAACEEIIINOOOUUYBF'；
设置@count=length（@withaccents）；
当@count>0时
设置@textvalue=replace（@textvalue，子字符串（@withaccents，@count，1），子字符串（@withoutaccents，@count，1））；
设置@count=@count-1；
结束时；
--特殊字符
设置@special='！@$%¨&*()_+=§¹²³£¢¬"`´{[^~}].:;?/°ºª+*|\\''';
设置@count=长度（@special）；
当@count>0时
设置@textvalue=replace（@textvalue，子字符串（@special，@count，1），“”）；
设置@count=@count-1；
结束时；
返回@textvalue；
结束
|

我想知道MariaDB用utf8\u unicode\u ci替换的

REGEXP\u（col，'e'，'e'）

是否可以一次完成所有

e

。

这里有一个简单的解决方案，只需一个查询：

UPDATE `my_table` SET alias = lower(name),
alias = replace(alias,'Š','S'),
alias = replace(alias,'š','s'),
alias = replace(alias,'Ð','Dj'),
alias = replace(alias,'Ž','Z'),
alias = replace(alias,'ž','z'),
alias = replace(alias,'À','A'),
alias = replace(alias,'Á','A'),
alias = replace(alias,'Â','A'),
alias = replace(alias,'Ã','A'),
alias = replace(alias,'Ä','A'),
alias = replace(alias,'Å','A'),
alias = replace(alias,'Æ','A'),
alias = replace(alias,'Ç','C'),
alias = replace(alias,'È','E'),
alias = replace(alias,'É','E'),
alias = replace(alias,'Ê','E'),
alias = replace(alias,'Ë','E'),
alias = replace(alias,'Ì','I'),
alias = replace(alias,'Í','I'),
alias = replace(alias,'Î','I'),
alias = replace(alias,'Ï','I'),
alias = replace(alias,'Ñ','N'),
alias = replace(alias,'Ò','O'),
alias = replace(alias,'Ó','O'),
alias = replace(alias,'Ô','O'),
alias = replace(alias,'Õ','O'),
alias = replace(alias,'Ö','O'),
alias = replace(alias,'Ø','O'),
alias = replace(alias,'Ù','U'),
alias = replace(alias,'Ú','U'),
alias = replace(alias,'Û','U'),
alias = replace(alias,'Ü','U'),
alias = replace(alias,'Ý','Y'),  
alias = replace(alias,'š','s'),
alias = replace(alias,'Ð','Dj')
alias = replace(alias,'ž','z'),
alias = replace(alias,'Þ','B'),
alias = replace(alias,'ß','Ss'),
alias = replace(alias,'à','a'),
alias = replace(alias,'á','a'),
alias = replace(alias,'â','a'),
alias = replace(alias,'ã','a'),
alias = replace(alias,'ä','a'),
alias = replace(alias,'å','a'),
alias = replace(alias,'æ','a'),
alias = replace(alias,'ç','c'),
alias = replace(alias,'è','e'),
alias = replace(alias,'é','e'),
alias = replace(alias,'ê','e'),
alias = replace(alias,'ë','e'),
alias = replace(alias,'ì','i'),
alias = replace(alias,'í','i'),
alias = replace(alias,'î','i'),
alias = replace(alias,'ï','i'),
alias = replace(alias,'ð','o'),
alias = replace(alias,'ñ','n'),
alias = replace(alias,'ò','o'),
alias = replace(alias,'ó','o'),
alias = replace(alias,'ô','o'),
alias = replace(alias,'õ','o'),
alias = replace(alias,'ö','o'),
alias = replace(alias,'ø','o'),
alias = replace(alias,'ù','u'),
alias = replace(alias,'ú','u'),
alias = replace(alias,'û','u'),
alias = replace(alias,'ý','y'),
alias = replace(alias,'ý','y'),
alias = replace(alias,'þ','b'),
alias = replace(alias,'ÿ','y'),
alias = replace(alias,'ƒ','f'),
alias = replace(alias, 'œ', 'oe'),
alias = trim(alias);

在本例中：

• “my_table”是表的名称
• “name”是原始字段
• “alias”是新字段

希望有帮助

如果尝试使用mysql生成slug字段，也可以检查此变量：

---

user3245067的解决方案很好，但它使用会话变量。 这是mysql 5.5中使用局部变量和确定性关键字的解决方案。在mysql-5.5中使用德国umlaute进行测试

drop function if exists fn_remove_accents;
delimiter $$
create function fn_remove_accents( param_textvalue varchar(20000) )
returns varchar(20000) DETERMINISTIC
begin

DECLARE var_textvalue VARCHAR(20000);
DECLARE var_withaccents VARCHAR(50);
DECLARE var_withoutaccents VARCHAR(50);
DECLARE var_count INT;
DECLARE var_special INT;

set var_textvalue = param_textvalue;

-- ACCENTS
set var_withaccents = 'ŠšŽžÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÑÒÓÔÕÖØÙÚÛÜÝŸÞàáâãäåæçèéêëìíîïñòóôõöøùúûüýÿþƒ';
set var_withoutaccents = 'SsZzAAAAAAACEEEEIIIINOOOOOOUUUUYYBaaaaaaaceeeeiiiinoooooouuuuyybf';
set var_count = length(var_withaccents);

while var_count > 0 do
    set var_textvalue = replace(var_textvalue, substring(var_withaccents, var_count, 1), substring(var_withoutaccents, var_count, 1));
    set var_count = var_count - 1;
end while;

-- SPECIAL CHARS
set var_special = '!var_#$%¨&*()_+=§¹²³£¢¬"`´{[^~}]<,>.:;?/°ºª+*|\\''';
set var_count = length(var_special);
while var_count > 0 do
    set var_textvalue = replace(var_textvalue, substring(var_special, var_count, 1), '');
    set var_count = var_count - 1;
end while;

return var_textvalue;

end$$

delimiter ;

drop函数（如果存在）fn\u remove\u重音符号；
分隔符$$
创建函数fn_remove_重音（param_textvalue varchar（20000））
返回varchar（20000）值
开始
声明var_textvalue VARCHAR（20000）；
用重音符号VARCHAR（50）声明var_；
声明var_，不带重音符号VARCHAR（50）；
声明var_count INT；
声明var_特殊INT；
设置var_textvalue=param_textvalue；
--口音
用重音设置变音；
设置不带重音的变量='SSZZAAAAAAAAACEEEIIINOOOOOUUUUYBAAAAACEEEIIINOOOUUUUYBF'；
设置变量计数=长度（带重音的变量）；
当var_count>0时
设置var_textvalue=replace（var_textvalue，子字符串（var_带重音，var_count，1），子字符串（var_不带重音，var_count，1））；
设置var\u count=var\u count-1；
结束时；
--特殊字符
设置var_special='！var_35;$%&*（）_+=§CharStyle³×，“`{[^}]：/°ºª+*|\\''';
设置变量计数=长度（变量特殊）；
当var_count>0时
设置var_textvalue=replace（var_textvalue，子字符串（var_special，var_count，1），“”）；
设置var\u count=var\u count-1；
结束时；
返回var_textvalue；
结束$$
定界符；

看看这篇文章，你不需要再写一列，更改查询为什么不使用正则表达式，例如（a |á）@Eric Fortis regex在这种情况下是不必要的，并且heavy@eric，因为那会变得巨大。PHP的iconv（）会有所帮助。不过，我会注意到，在TCPDF源代码中，有许多特殊注意事项不是PHP使用的任何库所固有的（为了非常安全/了解Unicode）。@Eric Fortis:考虑到所有可能的重音组合，这将是一个很长的正则表达式，您可能会忘记一些。此外，在某些编码中，某些字符在逻辑上无法转换为ASCII码（例如，在德语中，

o

可能会成为

oe

）问题。。对于非常非英语的角色来说，这个效果如何？@zanlok:不太好。它做了一些工作，例如“ß”等于“ss”，但更进一步，它会崩溃。

“ß”=“ss”COLLATE utf8_unicode_ci

——是一个匹配项。“组合变音符号也可以在这种排序中起作用。

ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE utf8mb4_unicode_520_ci

CONVERT and CAST don t translatit characters congrats，伟大的存储过程a）这实际上回答了标题问题B）当你有一个没有预先生成的slug/pretty url和y的大型项目列表时，这非常有用你想直接在DB中生成它们（因为有大量的值）顺便说一句：我想添加

ě，ž，ť，ň，ů

效果很好！注意。它确实消除了重音，但是，一些语言对某些值使用不同的表示法（比如德语中的'ä'是'ae'，'ö'是'oe'，…）。这太棒了！只需快速注释：在“alias=replace（别名，'Ð'，'Dj'）”一行之后缺少一个逗号。您还可以添加这两行额外的内容，以获取更多变体：alias=replace（别名，'Ł'，'L'），alias=replace（别名，'ą'，'a'）），该解决方案很好，但使用会话变量而不是局部变量，并且缺少确定性关键字

drop function if exists fn_remove_accents;
delimiter $$
create function fn_remove_accents( param_textvalue varchar(20000) )
returns varchar(20000) DETERMINISTIC
begin

DECLARE var_textvalue VARCHAR(20000);
DECLARE var_withaccents VARCHAR(50);
DECLARE var_withoutaccents VARCHAR(50);
DECLARE var_count INT;
DECLARE var_special INT;

set var_textvalue = param_textvalue;

-- ACCENTS
set var_withaccents = 'ŠšŽžÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÑÒÓÔÕÖØÙÚÛÜÝŸÞàáâãäåæçèéêëìíîïñòóôõöøùúûüýÿþƒ';
set var_withoutaccents = 'SsZzAAAAAAACEEEEIIIINOOOOOOUUUUYYBaaaaaaaceeeeiiiinoooooouuuuyybf';
set var_count = length(var_withaccents);

while var_count > 0 do
    set var_textvalue = replace(var_textvalue, substring(var_withaccents, var_count, 1), substring(var_withoutaccents, var_count, 1));
    set var_count = var_count - 1;
end while;

-- SPECIAL CHARS
set var_special = '!var_#$%¨&*()_+=§¹²³£¢¬"`´{[^~}]<,>.:;?/°ºª+*|\\''';
set var_count = length(var_special);
while var_count > 0 do
    set var_textvalue = replace(var_textvalue, substring(var_special, var_count, 1), '');
    set var_count = var_count - 1;
end while;

return var_textvalue;

end$$

delimiter ;