SQL query question. Extracting data met for one of two conditions but not both - sql

Question

I'm extracting student data who have completed a list of courses for degree requirements. One of the courses on the list is equivalent to another course, so if a student completes both equivalent courses, it can only be counted once towards a degree. I need to extract data on students who completed the list of courses, while filtering for just one of the equivalent courses.
Where am I going wrong?
I've tried different OR and AND NOT clauses but I can't seem to get the result that I need
use coll18_live
select ENR_STUDENT_ID, ENR_TERM, CRS_NAME, ENR_GRADE
from dbo.CA320_ENROLLMENT_VIEW_N03
WHERE ENR_CENSUS_REG_FLAG = 'Y'
and ENR_TERM in ('14/FA', '15/SP')
and not (CRS_NAME = 'BUSI-105' and CRS_NAME = 'ENGL-120')
and CRS_NAME in ('ACCT-120', 'ACCT-125', 'BUSI-100', 'BUSI-103', 'BUSI-105', 'ENGL-120')
I expect the output to show students who completed ACCT-120, ACCT-12, BUSI-100, BUSI-103, and BUSI-105 or ENGL-120 (but not both BUSI-105 or ENGL-120)

Answer 1

I think you want aggregating with a having clause. You cannot do this with a WHERE, because the information you want is (apparently) in different rows:
select ENR_STUDENT_ID
from dbo.CA320_ENROLLMENT_VIEW_N03
where ENR_CENSUS_REG_FLAG = 'Y' AND
ENR_TERM in ('14/FA', '15/SP')
group by ENR_STUDENT_ID
having sum(case when CRS_NAME in ('ACCT-120', 'ACCT-125', 'BUSI-100', 'BUSI-103') then 1 else 0 end) = 4 and
sum(case when CRS_NAME in ('BUSI-105', 'ENGL-120') then 1 else 0 end) > 0;