Is the following query possible with SQL Pivot?

Question

Let\'s say I have the following tables:

create table student(
  id number not null,
  name varchar2(80),
  primary key(id)
);

create table class(
  id numbe         


        

Answer 1

Disclaimer: I don't know apex specifically.

Here's a correct pivot query, assuming the class you want has an ID = 1, and that the meeting_id's for that class are 1,2,3.

select * from(
  select s.name, a.present,m.id meeting_id
  from student s, meeting_attendance a, class_meeting m, class c
  where s.id = a.student_id
    and m.id = a.meeting_id
    and c.id = m.class_id 
    and c.id = 1
)
pivot(
      sum(present)
      for meeting_id in(1,2,3)
);

I don't believe you can use a sub-query to return the values for the "for in" of the pivot.