SQL Query Inactive Users with last end date - sql

Question

This is a follow up from a question I asked about a year ago Old thread
The answers I got then have worked fine but now I discovered that I need to tweak the query to be able to get the latest end date for the inactive users.
So again here's a quick example table of users, some are active and some are inactive and some have several period of employment.
when someone is reemployed a new row will be added for that employment period.
Username will always be the same.
So I want to find which users that is disabled and doesn't have an active employment also if there is several period of employment I want the one that has the latest end date. One row per username with all the columns.
The database is SQL Server 2016.
Example table:
| username | name | active | Job title | enddate
+-----------+----------- +--------+-------------+----------
| 1111 | Jane Doe | 1 | CIO | 1/3/2022
| 1111 | Jane Doe | 0 | Janitor | 1/2/2018
| 1112 | Bob Doe | 1 | Coder | NULL
| 1113 | James Doe | 0 | Coder | 1/3/2018
| 1114 | Ray Doe | 1 | Manager | NULL
| 1114 | Ray Doe | 0 | Clerk | 2/2/2019
| 1115 | Emma Doe | 1 | Waiter | NULL
| 1116 | Sarah Doe | 0 | Greeter | 3/4/2016
| 1116 | Sarah Doe | 0 | Trainer | 4/5/2019
So for user 1116 I would ideally get one row with enddate 4/5/2019
The query I use from the answers in the old thread is this one:
;WITH NonActiveDisabledUsers AS
(
SELECT DISTINCT
U.username
FROM
UserEmployment AS U
WHERE
U.active = 0 AND
NOT EXISTS (SELECT 'no current active employment'
FROM UserEmployment AS C
WHERE U.username = C.username AND
C.active = 1 AND
(C.enddate IS NULL OR C.enddate >= CONVERT(DATE, GETDATE())))
)
SELECT
R.*
FROM
NonActiveDisabledUsers AS N
CROSS APPLY (
SELECT TOP 1 -- Just 1 record
U.*
FROM
UserEmployment AS U
WHERE
N.username = U.username AND
U.active = 0
ORDER BY
U.enddate DESC -- Determine which record should we display
) AS R
This gives me the right user and employment status but not the latest end date since it will get the first result for user 1116

Answer 1

We can use conditional aggregation with a window aggregate to get the number of active rows for this user.
We then filter to only inactive, and row-number the result by enddate taking the first row per group:
SELECT
username,
name,
active,
[Job title],
enddate
FROM (
SELECT *, rn = ROW_NUMBER() OVER (PARTITION BY username ORDER BY enddate DESC)
FROM (
SELECT *,
CountOfActive = COUNT(CASE WHEN
Active = 1 AND
(enddate IS NULL OR enddate >= CONVERT(DATE, GETDATE())) THEN 1 END
) OVER (PARTITION BY username)
FROM UserEmployment
) AS t
WHERE CountOfActive = 0
) AS t
WHERE rn = 1;
Note that the row-numbering does not take into account nulls in enddate which would be sorted last. You would need a conditional ordering:
ROW_NUMBER() OVER (PARTITION BY username ORDER BY CASE WHEN enddate IS NULL THEN 0 ELSE 1 END ASC, enddate DESC)

Answer 2

Hmmm . . . I think you can just get the most recent record and check that it is not active:
select ue.*
from (select ue.*,
row_number() over (partition by user_id
order by active desc, enddate desc
) as seqnum
from UserEmployment ue
) ue
where seqnum = 1 and active = 0;

Answer 3

Here is a variant that will produce the desired result:
SELECT distinct username, max(enddate)
FROM UserEmployment as t1
WHERE
t1.active = 0 AND
NOT EXISTS (select username from UserEmployment as t2 WHERE active = 1 AND
(t2.enddate IS NULL OR t2.enddate >= CONVERT(DATE, GETDATE())) AND
t1.username = t2.username)
GROUP BY username