How to optimise SQL query without using NOT IN - sql

Question

I have this Student table:
Id companyId status
----------------------------------------
101 1001 In-Progress
102 1001 In-Progress
103 1001 Final
104 1002 In-Progress
105 1003 Pending With Company
106 1003 In-Progress
107 1004 In-Progress
108 1004 In-Progress
109 1005 In-Progress
110 1005 Completed
111 1006 In-Progress
112 1006 Canceled
113 1007 In-Progress
114 1007 Pending with Student
I want output with these conditions:
Status is "In-Progress"
If have repeated companyId then other allowed staus is Completed, Canceled (Basically only allowed combination of the staus is In-Progress, Completed and Canceled)
With above condition o/p will look like this:
Id companyId status
--------------------------------
104 1002 In-Progress
107 1004 In-Progress
108 1004 In-Progress
109 1005 In-Progress
111 1006 In-Progress
We can achieve this by using NOT IN
SELECT *
FROM student
WHERE status = 'In-Progress'
AND companyId NOT IN (SELECT companyId FROM student
WHERE status IN ('Final', 'Pending With Company ', 'Pending with Student'));
But I'm looking for a solution without using NOT IN.

Answer 1

You can use not exists
SELECT *
FROM student a
WHERE a.status = 'In-Progress'
AND NOT EXISTS (SELECT null
FROM student b
WHERE a.companyid=b.companyid
AND b.status not in ('In progress','Completed','Cancelled')
)

Answer 2

you can achieve it using left join and choosing not match rows:
SELECT * FROM student a LEFT JOIN
( SELECT companyId FROM student WHERE status in
('Final','Pending With Company ','Pending with Student')) b
on a.companyid=b.companyId
where b.companyId is null
and a.status = 'In-Progress'

Answer 3

WITH status as (
select 1 as s,'In-Progress' d union all
select 100 as s,'Final' d union all
select 100 as s,'Pending With Company' d union all
select 100 as s,'Pending with Student' d union all
select 1 as s,'Cancelled' d union all
select 1 as s,'Completed'
)
SELECT * FROM (
SELECT
s.Id,
s.CompanyID,
s.status,
MAX(status.s) OVER (partition by s.CompanyId) m
FROM student s
LEFT jOIN status ON s.status = status.d
) x where x.m=1 and x.status='In-Progress'
Remember, above is simply not using NOT IN. Discussion about this query not being performant is different.