SQL: Find MIN but greater than a MAX - sql-server

Question

I am working with task history and trying to find two dates attached to the same record: 1) Most recent time a task was approved (max approve); 2)The first submitted date after said approval.
Here is what I have so far:
Select
a.assn_uid,
max(b.ASSN_TRANS_DATE_ENTERED) as LastApprove,
e.LastSubmitted
FROM [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS] a
inner join [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS_COMMENTS] b
on a.ASSN_TRANS_UID = b.ASSN_TRANS_UID
join (select c.assn_uid,
min(d.ASSN_TRANS_DATE_ENTERED) as LastSubmitted
FROM [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS] c
inner join [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS_COMMENTS] d
on c.ASSN_TRANS_UID = d.ASSN_TRANS_UID
where c.ASSN_UID = '499879BC-28B2-E411-8B0A-00059A3C7A00'
and d.[ASSN_TRANS_COMMENT_TYPE_ENUM] = 0
group by c.assn_uid ) e
on e.ASSN_UID = a.ASSN_UID
where a.ASSN_UID = '499879BC-28B2-E411-8B0A-00059A3C7A00'
and b.[ASSN_TRANS_COMMENT_TYPE_ENUM] = 1
group by a.assn_uid, e.LastSubmitted
This is close, however, it gives me the first time ever that the task was submitted. I am sure that I need to use another subquery, I just dont know how to reference a column within the same result.
Here is the task history. Highlighted are the two dates I am trying to show:

Answer 1

I don't know that I could wade through your query in any reasonable amount of time, but to get the row after a particular row, you'd need to do something like this:
create table #submissions (
ID int,
DateAdded datetime,
SubmissionType nvarchar(100)
)
insert #submissions values
(1, '2010-01-01', 'first ever'),
(1, '2010-01-02', 'second'),
(1, '2010-01-03', 'third'),
(1, '2010-01-04', 'approve'),
(1, '2010-01-05', 'first after approve'),
(1, '2010-01-06', 'second after approve'),
(1, '2010-01-07', 'third after approve')
declare #lastApprovalDate datetime
select #lastApprovalDate = MAX(DateAdded)
from #submissions
where
SubmissionType = 'approve'
declare #firstAfterApprovalDate datetime
select #firstAfterApprovalDate = MIN(DateAdded)
from #submissions
where
DateAdded > #lastApprovalDate
select *
from #submissions
where
DateAdded = #firstAfterApprovalDate
drop table #submissions
In general, get the last approval date using MAX(), then get the first date after that date using MIN() where DateAdded > that max, and then select the row at that date. I added Top 1, just in case there happen to be multiple rows at that time. Not sure if that's possible in your data, but just to be safe.

Answer 2

With some help, we figured out we needed an additional min wrapped around the query.
SELECT
final.assn_uid,
final.LastApprove,
min(final.SubmissionDate) FirstSubmitted
FROM
(Select
a.assn_uid,
max(b.ASSN_TRANS_DATE_ENTERED) as LastApprove,
e.SubmittedDates SubmissionDate
FROM [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS] a
inner join [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS_COMMENTS] b
on a.ASSN_TRANS_UID = b.ASSN_TRANS_UID
join (select c.assn_uid,
(d.ASSN_TRANS_DATE_ENTERED) as SubmittedDates
FROM [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS] c
inner join [PRJDEV_ProjectWebApp].[pub].[MSP_ASSIGNMENT_TRANSACTIONS_COMMENTS] d
on c.ASSN_TRANS_UID = d.ASSN_TRANS_UID
where c.ASSN_UID = '499879BC-28B2-E411-8B0A-00059A3C7A00'
and d.[ASSN_TRANS_COMMENT_TYPE_ENUM] = 0
) e
on e.ASSN_UID = a.ASSN_UID
where a.ASSN_UID = '499879BC-28B2-E411-8B0A-00059A3C7A00'
and b.[ASSN_TRANS_COMMENT_TYPE_ENUM] = 1
and e.SubmittedDates > b.ASSN_TRANS_DATE_ENTERED
group by a.assn_uid, e.SubmittedDates) Final
GROUP BY
final.assn_uid,
final.LastApprove