Calculate years from each date in Oracle SQL - sql

Question

Noob question. I'm writing a script to execute a report showing:
Student last name and first name (comma separated), years enrolled, academic advisor last name and first name (comma separated)
Sort: years enrolled
Filter: only include currently active students
Struggling with calculating years enrolled and filtering by active students.
The tables I'm using:
SELECT CONCAT(CONCAT(Student.Last_Name, ', '), Student.First_Name) AS "Student",
Student_Enrollment_Status.Date_Status_Updated,
CONCAT(CONCAT(Faculty.Last_Name, ', '), Faculty.First_Name) AS "Advisor"
FROM Student
WHERE Faculty.Faculty_ID = Student.Advisor_ID
AND Student(Student_ID) = Student_Enrollment_Status(Student_ID)
AND Student_Enrollment_Status(Status_ID) = Enrollment_Status (Status_ID);

Answer 1

It would be something like this:
lines #1 - 22 represent sample data (you don't type that)
query you need begins at line #24
years enrolled is calculated by subtracting current year and year of enrollment; that's rather inaccurate, but - you didn't explain what exactly it means
I presumed that active statuses are IDs (2, 3, 5)
SQL> with
2 student (student_id, first_name, last_name, advisor_id) as
3 (select 1, 'ash', 'smith', 9 from dual union all
4 select 2, 'tash', 'paul', 8 from dual union all
5 select 3, 'carl', 'wall', 6 from dual union all
6 select 4, 'fred', 'john', 3 from dual),
7 student_enrollment_status (student_id, status_id, date_status_updated) as
8 (select 1, 2, date '2017-09-04' from dual union all
9 select 2, 3, date '2018-09-05' from dual union all
10 select 3, 3, date '2018-09-05' from dual union all
11 select 4, 2, date '2019-09-04' from dual),
12 enrollment_status (status_id, status) as
13 (select 2, 'enrolled' from dual union all
14 select 3, 'on leave' from dual union all
15 select 4, 'full time' from dual union all
16 select 5, 'part time' from dual union all
17 select 6, 'withdrawn' from dual),
18 faculty (faculty_id, first_name, last_name) as
19 (select 9, 'jane', 'gold' from dual union all
20 select 8, 'sam', 'greene' from dual union all
21 select 6, 'mark', 'west' from dual union all
22 select 3, 'jen', 'dash' from dual)
23 --
24 select s.last_name ||', '|| s.first_name student,
25 extract(year from sysdate) - extract(year from ses.date_status_updated)
26 years_enrolled,
27 f.last_name ||', '|| f.first_name advisor
28 from student s join student_enrollment_status ses on ses.student_id = s.student_id
29 join enrollment_status es on es.status_id = ses.status_id
30 join faculty f on f.faculty_id = s.advisor_id
31 where es.status_id in (2, 3, 5)
32 order by years_enrolled;
STUDENT YEARS_ENROLLED ADVISOR
----------- -------------- ------------
john, fred 1 dash, jen
paul, tash 2 greene, sam
wall, carl 2 west, mark
smith, ash 3 gold, jane
SQL>