Querying using table-valued parameter

Question

I need help please with writing a sproc, it takes a table-valued parameter @Locations, whose Type is defined as follows:

CREATE TYPE [dbo].[tvpLocation] AS TABLE(
    [CountryId] [int] NULL,
    [ResortName] [nvarchar](100) NULL,
    [Ordinal] [int] NOT NULL,
    PRIMARY KEY CLUSTERED 
(
    [Ordinal] ASC
)WITH (IGNORE_DUP_KEY = OFF)
)

@Locations will contain at least 1 row. Each row WILL have a non-null CountryId, and MAY have a non-null ResortName. Each row will have a unique Ordinal, the first being 0. The combinations of CountryId and ResortName in @Locations will be unique.

The sproc needs to search against the following table structure.

The image can be seen better by right-clicking it and View Image, or similar depending on your browser.

Now this is where I'm stuck, the sproc should be able to find Tours where:

• The Tour's 1st TourHotel (Ordinal 0) has the same CountryId (and ResortName if specified) of the 1st row of @Locations (Ordinal 0).
• And also if @Locations has > 1 row, the Tour must have additional TourHotels, ALL of which must be in the remaining CountryIds (and ResortNames if specified) of these remaining @Locations rows.

Edit This is the code I finally used, based on Anthony Faull's suggestion. Thank you so much Anthony:

select distinct T.Id
from tblTour T
join tblTourHotel TH on TH.TourId = T.Id
join tblHotel H ON H.Id = TH.HotelId
JOIN @Locations L ON
    (
        (
            L.Ordinal = 0
            AND TH.Ordinal = 0
        )
        OR
        (
            L.Ordinal > 0
            AND TH.Ordinal > 0
        )
    )
    AND L.CountryId = H.CountryId
    AND
    (
        L.ResortName = H.ResortName
        OR L.ResortName IS NULL
    )
cross apply( select COUNT(TH2.Id) AS [Count] FROM tblTourHotel TH2 where TH2.TourId = TH.TourId ) TourHotelCount
where
TourHotelCount.[Count] = @LocationCount
group by T.Id, T.TourRef, T.Description, T.DepartureDate, T.NumNights, T.DepartureAirportId, T.DestinationAirportId, T.AirlineId, T.FEPrice
having COUNT(distinct TH.Id) = @LocationCount

Answer 1

WITH Matches AS
(
    SELECT TH.TourId, TH.Ordinal
    FROM dbo.tblTourHotel TH
    WHERE EXISTS
    (
        SELECT 1
        FROM dbo.tblHotel H
        JOIN @Locations L ON
            (
                (
                    L.Ordinal = 0
                    AND TH.Ordinal = 0
                )
                OR
                (
                    L.Ordinal > 0
                    AND TH.Ordinal > 0
                )
            )
            AND L.CountryId = H.CountryId
            AND
            (
                L.ResortName = H.ResortName
                OR L.ResortName IS NULL
            )
        WHERE H.Id = TH.HotelId
    )
)
SELECT M.TourId
FROM Matches M
WHERE
(
    NOT EXISTS
    (
        SELECT 1
        FROM @Locations L
        WHERE L.Ordinal > 0
    )
    OR NOT EXISTS
    (
        SELECT 1
        FROM dbo.tblTourHotel TH
        WHERE TH.Ordinal > 0
        AND NOT EXISTS
        (
            SELECT 1
            FROM Matches M
            WHERE M.Ordinal = TH.Ordinal
            AND M.TourId = TH.TourId
        )
    )
)
WHERE M.Ordinal = 0