Hi, I need insert null value in field database when I delete all text in a field form. How could I do that? Thanks in advanced.

Hello Eduardo,
Why not set null as a default value for your database field?

I did it in mysql database. I have a field called observations in the database. Sometimes I need this field contain info and sometimes not. I would like to set null value in the field database through an update form, not only empty the field.

In the update record step try using:

 {{$_POST.your_input.default(null)}}