View the Exhibit and examine the data in the
The PROJ_TASK_DETAILS table stores information about tasks involved in a project and the
relation between them.
The BASED_ON column indicates dependencies between tasks. Some tasks do not depend on
the completion of any other tasks.
You need to generate a report showing all task IDs, the corresponding task ID they are dependent
on, and the name of the employee in charge of the task it depends on.
Which query would give the required result?
A.
SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p JOIN proj_task_details d
ON (p.based_on = d.task_id);
B.
SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p LEFT OUTER JOIN proj_task_details d ON (p.based_on = d.task_id);
C.
SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p FULL OUTER JOIN proj_task_details d ON (p.based_on = d.task_id);
D.
SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p JOIN proj_task_details d
ON (p.task_id = d.task_id);