Criteria X-OR

[shafara7]

I have a table and I want to create a query with a criteria X-OR.

My table looks like this:
BillID CountryID TaskID Dates
10 1 3 01.01.2017
20 2 3 01.02.2017
30 2 4 01.03.2017
40 1 4 01.04.2017
10 2 6 01.05.2017
10 1 4 01.06.2017
20 3 1 01.07.2017

The BillID can be duplicated, but there can only be one BillID for each country.
I want to consider only the TaskID 3 and 4 in this query.
When I set my TaskID to 3 Or 4, the query showed both the records in green.
But I only want it to show either the record with TaskID 3 or 4 but not both, provided that the second record is the latest record. So it should only show BillID 10 Country 1 TaskID 4.
Plus, I already set the Dates to Max, so that it only pick the latest one.
When I set the criteria 3 X-Or 4, the same result is shown.

 

[isladogs]

Please post the query SQL used

 

[JHB]

Base a query on the query you've, then use the Max function on the Dates.

 

[shafara7]

SELECT tblMessauftrag.txtTeilesachnummer, tblMessauftrag.indFOLand, Max(tblMessauftrag.datLieferterminSoll) AS MaxvondatLieferterminSoll, tblMessauftrag.indMessaufgabe, Last(tblMessauftrag.indStatus) AS LetzterWertvonindStatus
FROM tblMessauftrag
GROUP BY tblMessauftrag.txtTeilesachnummer, tblMessauftrag.indFOLand, tblMessauftrag.indMessaufgabe
HAVING (((tblMessauftrag.indMessaufgabe)=3)) OR (((tblMessauftrag.indMessaufgabe)=4))
ORDER BY tblMessauftrag.txtTeilesachnummer;

So I have to create another query? Will that takes the space of the disk or reduce the performance?