How to prevent data entry in a column in a sql table?

Question

Database design

There is a sql table and one column is generated depending on the others. How to disable input in this data column?

Answer 1

Your subd can't generate columns? For example, mysql can
In a more general case - add a trigger in which you calculate a new value and thus ignore all attempts to fix it manually.

Answer 2

in the muscle only with rights (GRANT INSERT)
or a check/generate trigger from others

Answer 3

Make this column calculated. It cannot be updated.