Related Questions

If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has
In an Entity-Relationship (ER) model, suppose ? is a many-to-one relationship from entity set E1 to entity set E2. Assume that E1 and E2 participate totally in ? and that the cardinality of E1 is greater than the cardinality of E2. Which one of the following is true about ??
Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram?