Only get lastest Date time in SQL Server - sql

Question

I have created this code to pull tickets from our database and also pull the last ticket note date and last ticket user. It works except for if two people (or more) created a note on the last date (no matter the time difference) it will create multiple lines for each ticket. How do I fix this? here is the code:
Select distinct t.ticketID,
t.OpenDate,
c.categoryname,
s.statusname,
p.priorityname,
u.firstname,
u.lastname,
tu.firstname as 'tech_firstname',
tu.lastname as 'tech_lastname',
ltn.maxdate as 'last date',
ltu.firstname + ' ' + ltu.lastname as 'Last User'
from ticket t
left join category c on t.categoryid = c.categoryid
left join [status] s on t.statusid = s.statusid
left join [priority] p on t.priorityid = p.priorityid
left join [user] u on t.userid = u.userid
left join [user] tu on t.technicianid = tu.userid
left join ticketnote tn on t.ticketid = tn.ticketid
inner join (
Select Max(TicketNoteDate) as MaxDate, max(cast(ticketnotedate as time)) as MaxTime, ticketid, userid
From ticketNote
group by ticketid, userid) ltn on tn.ticketid = ltn.ticketid and tn.ticketnotedate = ltn.maxdate and cast(tn.ticketnotedate as time) = ltn.maxtime
left join [user] ltu on ltn.userid = ltu.userid
where t.statusid = 1
and t.LocationID = 1
order by t.ticketid

Answer 1

As suggested in comments, use row_number in your subquery where you get the maximum value
SELECT row_number() over
(partition by tiketid, userid
order by TicketNoteDate desc ) as rn,
ticketid,
userid,
ticketnotedate
and then join with outer query with condition being rn=1

Answer 2

I rewrote it getting the max date of all tickets, then finding all tickets with that max date and ordering by time descending and getting the first row and then retrieving extra data (like user) for that entry. I had no way of testing this, but here goes...
Select distinct t.ticketID,
t.OpenDate,
c.categoryname,
s.statusname,
p.priorityname,
u.firstname,
u.lastname,
tu.firstname as 'tech_firstname',
tu.lastname as 'tech_lastname',
ltn.maxdate as 'last date',
ltu.firstname + ' ' + ltu.lastname as 'Last User'
from ticket t
left join category c on t.categoryid = c.categoryid
left join [status] s on t.statusid = s.statusid
left join [priority] p on t.priorityid = p.priorityid
left join [user] u on t.userid = u.userid
left join [user] tu on t.technicianid = tu.userid
inner join (
select maxdate, maxtime, ticketid, userid, rownum from (
select maxdate, maxtime, ticketid, userid, row_number() over (order by maxdate desc, maxtime desc) as rownum
from ticketnote tn,
(Select Max(TicketNoteDate) as MaxDate
From ticketNote) mx
where mx.maxdate = tn.ticketnotedate
) x where x.rownum = 1
) ltn
left join [user] ltu on ltn.userid = ltu.userid
where t.statusid = 1
and t.LocationID = 1
order by t.ticketid