Mysql TRIM/RTRIM/REPLACE 无法从电子邮件列中删除尾随空格

Question

我有这个 insert select 语句，从员工批量复制数据添加暂存到员工 table:

INSERT INTO employee (tr_email) 
SELECT TRIM(eb.tr_email)
  FROM employee_bulkadd_staging eb
  ON DUPLICATE KEY UPDATE     
  tr_email=(SELECT IF(eb.tr_email = '' or eb.tr_email IS NULL, employee.tr_email,TRIM(eb.tr_email)));

即使我将其更改为 RTRIM 或 REPLACE(eb.tr_email, ' ', '') 以将空格替换为空，它仍然不会修改要插入的数据。我无法登录，因为我的后端应用程序检测到电子邮件地址末尾的这些尾随空格。

带有空格的示例电子邮件值如下所示，突出显示以显示空格：

来自来源table的电子邮件地址列，数据类型为varchar(100) utf8_general_ci

而目标 table 电子邮件列是 varchar(100) latin1_swedish_ci

我正在使用 MySQL 5. 感谢您的帮助。

Answer 1

我认为由于文本中的 CHAR(10)，您遇到了这个问题。你能尝试删除它吗 -

REPLACE(eb.tr_email, CHAR(10), '')

Answer 2

我已经对您的数据进行了编码，但无法重现空格问题。
Ankit 建议，回车 return 或换行符是否有问题：char(11) and/or char(13)？我添加了标记 < 和 > 以使空白字符的位置更清楚。

CREATE TABLE employee (
    id int not null auto_increment primary key,
    tr_email varchar(100) 
    collate latin1_swedish_ci
    )
    ;
CREATE TABLE employee_bulkadd_staging(
    id int not null auto_increment primary key,
    tr_email varchar(100) 
    collate utf8_general_ci
    )
    ;

insert into employee_bulkadd_staging (tr_email)
values ('name@domain.com   
');

insert into employee (tr_email)
select trim(REPLACE(tr_email,'
','')) from employee_bulkadd_staging

INSERT INTO employee (tr_email) 
SELECT TRIM(eb.tr_email)
  FROM employee_bulkadd_staging eb
  ON DUPLICATE KEY UPDATE     
  tr_email=(SELECT IF(eb.tr_email = '' or eb.tr_email IS NULL, employee.tr_email,TRIM(eb.tr_email)))

select 
concat('<',tr_email,'>' )
,
REPLACE(concat('<',tr_email,'>' ), '
', '')r
from employee_bulkadd_staging eb

concat('<',tr_email,'>' ) | r                   
:------------------------ | :-------------------
<name@domain.com   <br>>  | <name@domain.com   >

select id,concat('<',tr_email,'>') ebs from
 employee_bulkadd_staging;
 
select id, concat('<',tr_email,'>' ) emp 
 from employee;

id | ebs                     
-: | :-----------------------
 1 | <name@domain.com   <br>>

id | emp                     
-: | :-----------------------
 1 | <name@domain.com>       
 2 | <name@domain.com   <br>>

db<>fiddle here

Mysql TRIM/RTRIM/REPLACE 无法从电子邮件列中删除尾随空格

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