Fetch data in a single Row - sql

Question

I have two tables PackageDetail and PackageDuration
PackageDuration have the PackageID as Foreign Key i.e. can have multiple records with respect to PackageID
The Schema of the PackageDetail is:
PackageID INT PK
PackageName Nvarchar(50)
Schema of the PackageDuration Table is:
DurationID INT PK
Price Money
Duration Nvarchar(50)
PackageID INT FPK
PackageDetail tables have follwoing records:
PackageID PackageName
1 TestPackage
2 MySecondPackage
PackageDuration table have following records:
DurationID PackageID Price Duration
1 1 100 6
2 1 200 12
3 1 300 24
4 2 500 6
PackageDuration table can have max 3 records with one PackageID not more than this(if have ignore that)
Now I want to select the Records as in following Way:
PackageId PackageNAme Price1 Price2 Price3 Duration1 Duration2 Duration3
1 TestPackage 100 200 300 6 12 24
2 MySecondPackage 500 null null 6 null null
Please suggest me how can I achive this.

Answer 1

Another approach:
WITH Durations AS
(
SELECT *, ROW_NUMBER() OVER(PARTITION BY PackageId ORDER BY DurationId) Sequence
FROM PackageDuration
)
SELECT A.PackageId, B.PackageName,
MIN(CASE WHEN Sequence = 1 THEN Price ELSE NULL END) Price1,
MIN(CASE WHEN Sequence = 2 THEN Price ELSE NULL END) Price2,
MIN(CASE WHEN Sequence = 3 THEN Price ELSE NULL END) Price3,
MIN(CASE WHEN Sequence = 1 THEN Duration ELSE NULL END) Duration1,
MIN(CASE WHEN Sequence = 2 THEN Duration ELSE NULL END) Duration2,
MIN(CASE WHEN Sequence = 3 THEN Duration ELSE NULL END) Duration3
FROM Durations A
INNER JOIN PackageDetail B
ON A.PackageId = B.PackageId
GROUP BY A.PackageId, B.PackageName

Answer 2

This should work as long as the durations are unique for a package and they are either 6, 12, or 24.
SELECT
PackageDetail.PackageId, PackageDetail.PackageName,
D1.Price as Price1, D2.Price as Price2, D3.Price as Price3,
D1.Duration as Duration1, D2.Duration as Duration2, D3.Duration as Duration3
FROM PackageDetail
LEFT OUTER JOIN PackageDuration D1
ON D1.PackageId = PackageDetail.PackageId AND D1.Duration = 6
LEFT OUTER JOIN PackageDuration D2
ON D2.PackageId = PackageDetail.PackageId AND D2.Duration = 12
LEFT OUTER JOIN PackageDuration D3
ON D3.PackageId = PackageDetail.PackageId AND D3.Duration = 24

Answer 3

;WITH pvt AS
(
SELECT PackageID,
Price1 = MAX(CASE WHEN Duration = 6 THEN Price END),
Price2 = MAX(CASE WHEN Duration = 12 THEN Price END),
Price3 = MAX(CASE WHEN Duration = 24 THEN Price END),
Duration1 = MAX(CASE WHEN Duration = 6 THEN 6 END),
Duration2 = MAX(CASE WHEN Duration = 12 THEN 12 END),
Duration3 = MAX(CASE WHEN Duration = 24 THEN 24 END)
FROM dbo.PackageDuration
GROUP BY PackageID
)
SELECT
pvt.PackageID,
p.PackageName,
pvt.Price1, pvt.Price2, pvt.Price3,
pvt.Duration1, pvt.Duration2, pvt.Duration3
FROM
dbo.PackageDetail AS p
INNER JOIN
pvt ON p.PackageID = pvt.PackageID
ORDER BY p.PackageID;

Answer 4

Maybe I'm missing something in the requirements, but it seems like Sql Server's PIVOT is what you're looking for.
There are quite a few questions here at SO about PIVOT... Here's a good clean example with references to other questions: How do i transform rows into columns in sql server 2005
The big benefit of a pivot table over the other answers here is that it will scale out with no modifications if you add records to your PackageDuration table in the future.