Everything is Database Par: Nagham - Source: - vu :3709 fois   - Déposé le: 2011-11-03 20:51:44

I tried to be a relation between him and another strong entity, he has a primary key “bad thinking” and the other entity has a primary key “life”, the relation was many to many, so when time change our ER- Diagram to a Relational scheme, I have obliged to become a weak entity with a cardinality many to one and one to many, which means they have many of me and I have only them!. This made me stuck between those two entities and dependent on them, their primary keys became my foreign keys, and my primary key became the union of those two foreign keys which is “bad thinking in life”... I tried to help and relate those two entities but it seems I’m the one who needed help…”everything is Database”;)