Explanation:
For IAS..we need a high amptual amount of knowledge..
For IPS..we need master degree and physical fitness too..
For An Advocate..we need Master degree and social Skills..
so..the education and qualifications depends on the various jobs..
HOPE THE ANSWER IS USEFUL
A 50-year-old African American man
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);
Answer: 1 what do u think to help u
