Consider the employee work-team example, and assume that certain employees participate in more than one work team. A given employee may therefore appear in more than one of the team entity sets that are lower level entity sets of employee. Thus, the generalization is                            

Related MCQs

• If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has
• The completeness constraint may be one of the following: Total generalization or specialization, Partial generalization or specialization. Which is the default?
• A                            constraint requires that an entity belong to no more than one lower- level entity set.
• An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A.This is called as
• There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called
• Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
• An entity in A is associated with at most one entity in B. An entity in B, however, can be associated with any number (zero or more) of entities in A.
• View the Exhibit and examine the data in the EMPLOYEES tables. Evaluate the following SQL statement: SELECT employee_id, department_id FROM employees WHERE department_id= 50 ORDER BY department_id UNION SELECT employee_id, department_id FROM employees WHERE department_id= 90 UNION SELECT employee_id, department_id FROM employees WHERE department_id= 10; What would be the outcome of the above SQL statement?
• Consider a directed line(->) from the relationship set advisor to both entity sets instructor and student. This indicates _________ cardinality
• View the Exhibit and examine the structure of the EMPLOYEES and DEPARTMENTS tables. Which SET operator would you use in the blank space in the following SQL statement to list the departments where all the employees have managers? SELECT department_id FROM departments ____ SELECT department_id FROM employees WHERE manager_id IS NULL;