During the creation of database schemas, _________________________ means the field does not have to have a value; whereas, ___________________ means the field must have a value.

Question

During the creation of database schemas, _________________________ means the field does not have to have a value; whereas,  ___________________ means the field must have a value.

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The Answer of During the creation of database schemas, _________________________ means the field does not have to have a value; whereas,  ___________________ means the field must have a value.

During the Creation of Database Schemas, _________________________ Means the Field