शायद कुछ ऐसा:
पहले कुछ परीक्षण डेटा:
CREATE TABLE Flight(FlightId int,FlightNumber varchar(10))
CREATE TABLE FlightCapacity(ID int,FlightIdRef int,ClassIdRef int,Capacity int)
CREATE TABLE Class(ClassId int,Name varchar(10))
INSERT INTO Class VALUES(1,'Y'),(2,'A')
INSERT INTO Flight VALUES(1,123),(2,423)
INSERT INTO FlightCapacity VALUES(1,1,1,10),(2,1,2,20),(3,2,2,10)
फिर आपको इस तरह के अद्वितीय कॉलम प्राप्त करने होंगे:
DECLARE @cols VARCHAR(MAX)
SELECT @cols = COALESCE(@cols + ','+
QUOTENAME('ClassNameAndCapacity'+CAST(ClassId AS VARCHAR(10))),
QUOTENAME('ClassNameAndCapacity'+CAST(ClassId AS VARCHAR(10))))
FROM
Class
गतिशील sql को नाजुक और निष्पादित करें:
DECLARE @query NVARCHAR(4000)=
N'SELECT
*
FROM
(
SELECT
Flight.FlightNumber,
Class.Name+CAST(FlightCapacity.Capacity AS VARCHAR(100)) AS ClassName,
''ClassNameAndCapacity''+CAST(Class.ClassId AS VARCHAR(10)) AS ClassAndCapacity
FROM
Flight
JOIN FlightCapacity
ON Flight.FlightId=FlightCapacity.FlightIdRef
JOIN Class
ON FlightCapacity.ClassIdRef=Class.ClassId
) AS p
PIVOT
(
MAX(ClassName)
FOR ClassAndCapacity IN('[email protected]+')
) AS pvt'
EXECUTE(@query)
और फिर मेरे मामले में मैं बनाई गई तालिकाओं को छोड़ दूंगा:
DROP TABLE Flight
DROP TABLE Class
DROP TABLE FlightCapacity