عندك سـؤال او استفسـار ؟ !! " اتفضل هنا "

[hananfayad]

Which one of the following statements about referential integrity is false

it prevent you from deleting a parent record that has a related child record -
it prevent unauthorised persons from editing the database
it ensures that a child record can not be enterd unless it has a parent -
it prevents you from editing the primary key value in the parent table if there is a related record in the child table -

ففى أحد النماذج المحلولة من بعض الأساتذة الأفاضل كان الاختيار الثانى هو الحل
وفى نموذج آخر كان الحل هو الاختيار الأخير

فأيهما الصحيح؟