For the view of Exercise 4.18, explain why the database system would not allow a tuple to be inserted into the database through this view.
For reference
For the database of Figure 4.12, write a query to find the ID of each employee with no manager. Note that an employee may simply have no manager listed or may have a null manager. Write your query using an outer join and then write it again using no outer join at all.
OUTER JOIN
select e.ID from employee e left outer join manages m on e.ID = m.ID
where m.manager_id is null;
NO OUTER
select e.ID from employee e where e.ID not in (select m.ID from manages m) or e.ID in (select m.ID from manages m where m.manager_id is null);
<span>Exploit -</span> An attack that takes advantage of a system vulnerability, often<span> due to a combination of one or more improperly configured services.</span>
I'd say Davis was trying to increase persuasive power. Given that he saw that nobody was really his friend because he was shy and quiet, he tried to persuade people to like him by going to the game and hanging out with people.
Answer: A or B
Explanation: I think it's A or B Because they are the ones that make more sence
