How to Query 4 Pivot Tables - sql

Question

Could you help me to check as below:
DECLARE #tblCity TABLE (CityID INT, CityName VARCHAR(100))
DECLARE #tblHotel TABLE (HotelID INT, HotelName VARCHAR(100))
DECLARE #tblTourClass TABLE (TourClassID INT, TourClass VARCHAR(100))
DECLARE #tblTourHotel TABLE (id INT, CityID INT, HotelID INT, TourClassID INT)
INSERT INTO #tblCity SELECT 1, 'Phnom Penh' UNION SELECT 2, 'Siem Reap' UNION SELECT 3, 'Sihanouk Vill'
INSERT INTO #tblHotel SELECT 1, 'City Angkor Hotel' UNION SELECT 2, 'Phnom Penh Hotel' UNION SELECT 3, 'Sihanouk Ville Hotel' UNION SELECT 4, 'New York Hotel' UNION SELECT 5, 'Pacific Hotel' UNION SELECT 6, 'Angkor Star Hotel' UNION SELECT 7, 'Khemera Angkor Hotel' UNION SELECT 8, 'Sokha beach Hotel' UNION SELECT 9, 'Costle Hotel'
INSERT INTO #tblTourClass SELECT 1, 'Deluxe Class' UNION SELECT 2, 'Superior Class' UNION SELECT 3, 'Standard Class'
INSERT INTO #tblTourHotel SELECT 1, 1, 2, 1 UNION SELECT 2, 2, 1, 1 UNION SELECT 3,3,3,1 UNION SELECT 4,1,4,2 UNION SELECT 5,1,5,3 UNION SELECT 6,2,6,2 UNION SELECT 7,2,7,3 UNION SELECT 8,3,8,2 UNION SELECT 9,3,9,3
Here's the actual query:
SELECT CityName, [Deluxe Class], [Superior Class], [Standard Class]
FROM
(
SELECT tc.*, h.*, c.*
FROM #tblTourClass tc
LEFT JOIN #tblTourHotel th ON tc.TourClassID = th.TourClassID
LEFT JOIN #tblCity c ON th.CityID = c.CityID
LEFT JOIN #tblHotel h ON th.HotelID = h.HotelID
) AS sourcetable
PIVOT
( MAX(HotelName)
FOR TourClass IN ([Deluxe Class], [Superior Class], [Standard Class])
) AS pivottable
WHERE CityName IS NOT NULL
And the results:
City Name Deluxe Class Superior First Standard
Siem Reap City Angkor Hotel NULL NULL NULL
Phnom Penh Phnom Penh Hotel NULL NULL NULL
Sihanouk Vill Sihanouk Ville Hotel NULL NULL NULL
But I want to display as bellow:
City Name Deluxe Class Superior Standard
Siem Reap CityAngkor Hotel Angkor Star Hotel Khemera Angkor Hotel
Phnom Penh Phnom Penh Hotel New York Hotel Pacific Hotel
Sihanouk Sihanouk Hotel Sokha beach Hotel Costle Hotel
Could you help me to do how to display as above.
many thanks

Answer 1

Try this:
SELECT
pvt.CityName,
pvt.[Deluxe Class],
pvt.[Superior Class],
pvt.[Standard Class]
FROM (
SELECT
c
.CityName,
h.HotelName,
tc.TourClass
FROM #tblCity c
LEFT JOIN #tblTourHotel th ON c.CityID = th.CityID
LEFT JOIN #tblHotel h ON th.HotelID = h.HotelID
LEFT JOIN #tblTourClass tc ON th.TourClassID = tc.TourClassID
) t
PIVOT (
MAX(HotelName)
FOR TourClass IN ([Deluxe Class], [Superior Class], [Standard Class])
) AS pvt
It looks like the by using SELECT tc.*, h.*, c.*, the computation of the aggregate value became a problem. But I also rearranged the query so that #tblCity is the basis for all the LEFT JOINS.