T-SQL max date and min date between two date - sql

Question

First, thanks for your time and your help!
I have two tables:
Table 1
PersId name lastName city
---------------------------------------
1 John Smith Tirana
2 Leri Nice Tirana
3 Adam fortsan Tirana
Table 2
Id PersId salesDate
--------------------------------------------
1 1 2017-01-22 08:00:40 000
2 2 2017-01-22 09:00:00 000
3 1 2017-01-22 10:00:00 000
4 1 2017-01-22 20:00:00 000
5 3 2017-01-15 09:00:00 000
6 1 2017-01-21 09:00:00 000
7 1 2017-01-21 10:00:00 000
8 1 2017-01-21 18:55:00 000
I would like to see the first recent sales between two dates according to each city for each day I want to bring it empty if I do not have a sale
SalesDate > '2017-01-17 09:00:00 000'
and SalesDate < '2017-01-23 09:00:00 000'
Table 2, id = 5 because the record is not in the specified date range
If I wanted my results to look like
Id PersId MinSalesDate MaxSalesDate City
-----------------------------------------------------------------------------
1 1 2017-01-22 08:00:40 000 2017-01-22 20:00:00 000 Tirana
2 2 2017-01-22 09:00:00 000 null Tirana
3 3 null null Tirana
4 1 2017-01-21 09:00:00 000 2017-01-21 18:55:00 000 Tirana

Answer 1

You dont identify how to get ID in the result. You appear to just want Row_Number(). I will leave that out, but this should get you started. You may have to work out conversion issues in the data range check, and I havent checked the query for syntax errors, I will leave that to you.
Select T1.PersId, City
, Min(T2.salesDate) MinSalesDate
, Max(T2.salesDate) MaxSalesDate
From Table1 T1
Left Join Table2 T2
On T1.PersId = T2.PersId
And T2.salesDate Between '2017-01-17 09:00:00 000' And < '2017-01-23 09:00:00 000'
Group BY T1.PersId, T2.City

Answer 2

Try the following using row_number to get min and max sale dates:
SELECT
T2.Id, T1.PersId, T2.MIN_salesDate, T2.MAX_salesDate, T1.City
FROM Table1 T1
LEFT JOIN
(
SELECT MIN(Id) as Id, PersId, MIN(salesDate) as MIN_salesDate, MAX(salesDate) as MAX_salesDate
FROM
(
SELECT
*
,ROW_NUMBER() OVER (PARTITION BY PersId ORDER BY salesDate ASC) as RNKMIN
,ROW_NUMBER() OVER (PARTITION BY PersId ORDER BY salesDate DESC) as RNKMAX
FROM Table2 T2
WHERE salesDate Between '2017-01-17 09:00:00 000' And '2017-01-23 09:00:00 000'
) temp
WHERE RNKMIN = 1 or RNKMAX = 1
GROUP BY PersId
) T2
on T1.PersId = T2.PersId