Students studying information modeling and specification can benefit from homework help in programming complex entity-relationship diagrams and database schema. Tutors providing homework help in programming information systems emphasize proper data normalization, integrity constraints, and relationships between entities to transform requirements into accurate models.
a) In the first population, one element from B corresponds to at most one element from A. Therefore, there is one-to-many relationship. One-to-may constraint should be added.
b) Here, more than one elements from A correspond to more than one elements from B, and vice versa. This is a many-to-many relationship. Many-to-many constraint should be added.
c) In this population, one element from A corresponds to one element from B, and vice versa. This is a one-to-one relationship. One-to-one constraint should be added.
d) Finally, in the last population, at most one element from B corresponds to one or more elements in A. Therefore, this is a many-to-one relationship. Many-to-one constraint should be added.
1)For one-to-many, we can propose the following schema
An example of population can be like this:
2) For many-to-one constraint pattern, the scheme is:
The population can be represented as follows: