In a custom field can we change the same field not required at its back-end in Salesforce?

If we create any custom field and make it required. Is it possible that we can change the same field required or not required at its database (present in back-end)?

• This discussion was modified 6 years, 3 months ago by  Forcetalks.
• This discussion was modified 6 years, 3 months ago by  Forcetalks.
• This discussion was modified 6 years, 3 months ago by  Forcetalks.