How to detect and replace non-printable characters from table?

问题

I have imported data from xls file into table. but there are some garbage (non ascii charactors).

I want to remove those non printable characters from database.

here is the query i found which can select the entries which has non-ascii characters

 select * from TABLE where COLUMN regexp '[^ -~]';

But how can i remove those characters from table using mysql query or procedure ?

Please give suggestions.

thanks in advance.

来源：https://stackoverflow.com/questions/11243541/how-to-detect-and-replace-non-printable-characters-from-table