How to update column with null value

Question

I am using mysql and need to update a column with a null value. I have tried this many different ways and the best I have gotten is an empty string.

Is there a speci

Answer 1

In the above answers, many ways and repetitions have been suggested for the same. I kept looking for an answer as mentioned is the question but couldn't find here.

Another way to put the above question "update a column with a null value" could be "UPDATE ALL THE ROWS IN THE COLUMN TO NULL"

In such a situation following works

update table_name
set field_name = NULL
where field_name is not NULL;

is as well is not works in mysql