What is the MySQL query equivalent of PHP strip_tags?

Question

I have a large database which contains records that have tags in them and I would like to remove them. Of course there is the method where I create a

Answer 1

Boann's works once I added SET $str = COALESCE($str, '');.

from this post:

Also to note, you may want to put a SET $str = COALESCE($str, ''); just before the loop otherwise null values may cause a crash/never ending query. – Tom C Aug 17 at 9:51