从mysql数据中删除不可见的退格字符

Question

I have the following invisible character in my dataset 我的数据集中有以下不可见字符

Which I believe is this character 我相信这个角色

How do I remove this? 我该如何删除？ I've tried 我试过了

UPDATE events SET `value` = TRIM(REPLACE(`value`, CONVERT(char(8) USING hp8), ''))

Answer 1

MySQL escape sequence for literal backspace character is \\b . 文字退格字符的MySQL转义序列为\\b 。

See "Special Character Escape Sequences" here: 请参阅此处的“特殊字符转义序列”：

If I needed to remove that character from a string column, I'd use an expression like this: 如果需要从字符串列中删除该字符，请使用以下表达式：

 REPLACE(foo,'\b','')

I'd test that expression in a SELECT statement before I tried an UPDATE, eg 在尝试执行UPDATE之前，我会先在SELECT语句中测试该表达式，例如

SELECT t.foo
     , REPLACE(t.foo,'\b','')` AS new_foo
  FROM mytable t
 WHERE t.foo LIKE '%\b%'