mySQL-Workbench 5.2
Zu “identifying” und “non-identifying relationships”, die in mysql-Workbench benutzt werden:
“Identifying Relationship – An identifying relationship is a relationship between two entities in which an instance of a child entity is identified through its association with a parent entity, which means the child entity is dependent on the parent entity for its identify and cannot exist without it. In an identifying relationship, one instance of the parent entity is related to multiple instances of the child.” bzw. “Non-Identifying Relationship – A non-identifying relationship is a relationship between two entities in which an instance of the child entity is NOT identified through its association with a parent entity, which means the child entity is NOT dependent on the parent entity for its identify and can exist without it. In a non-identifying relationship, one instance of the parent entity is related to multiple instances of the child.”(http://www.datamodel.org/DataModelDictionary.html#NonIDRel , nicht mehr erreichbar)