What are the requirements that two relations must satisfy in order to be considered union compatiblity?why ar those requirements necessary ?

Question 1: Map the following ER diagram into a relation schema. Show the different constraints. u1 m- m- A B r1 al a2 s1 b1 b2 t1 c1 ......

Four challenges arise during the merger of relations, each with a remedy. Computer science

What are the two requirements that an entity must meet in order to be classified as a weak entity?Give an example of a weak or susceptible entity to illustrate your point.

Which of the following criteria would make an entity a weak entity? a.) If the primary key is not derived from the parent entity in the relationship b.) If the entity can exist without the entity with which it has a relationship c.) If the primary key of a related entity contains the primary key of the parent entity d.) If the entity has a primary key that is partially derived from the parent entity

please answer with proper explanation and step by step solution.

How do you map a "Many to Many" relationship when mapping ER Diagram to Schema Select one: O a. Take the primary key of both entities and put them as foreign keys in a separate table O b. Take the primary key of entity in the second "Many" side and put it as a foreign key in the table representing entity in the first "Many" side O c. Take the primary key of entity in the first "Many" side and put it as a foreign key in the table representing entity in the second "Many" side O d. Take the primary key of entity in the "Many" side and put it as a foreign key in the table representing entity in the "full" side

Assume that there is a one-to-one match in the advisor relationship set. What further restrictions are required on the relation advisor to ensure that the one-to-one cardinality criterion is upheld?

1. Use Bizagi Processer Modeler to model any FUNCTIONAL PERSPECTIVE part of the registration process and include both exclusive join, exclusive split and parallel split and parallel join. 2. Take the process model in question 1 and enrich it with both physical and electronic artifacts.

When must a many-to-many relationship bemodeled as an associative entity