Query for Tracking Item

Question

Hi There,
We have a table in Database with Columns ( Installed, Removed, Transaction Date ) , that table tracks the Parts when it is installed in store and when that part was removed from store with Transaction Dates
So from below example how to get the "Part A" install and Removal Dates ?
Please Help !!
Thanks,
Learning Bee !!
Dotnet.Explorer

Answer 1

Please try this code:
IF OBJECT_ID('dbo.Track') IS NOT NULL
DROP TABLE dbo.Track;
GO
CREATE TABLE dbo.Track
Installed NVARCHAR(10) ,
Removed NVARCHAR(10) ,
TransactionDate INT
GO
INSERT INTO dbo.Track
( Installed, Removed, TransactionDate )
VALUES ( N'Part A', NULL, '2007' ) ,
( N'Part X', N'Part A', '2008' ) ,
( N'Part A', N'Part X', '2009' ) ,
( N'Part Y', N'Part A', '2010' ) ,
( N'Part A', N'Part Y', '2011' );
GO
WITH NewTrack
AS ( SELECT * ,
ROW_NUMBER() OVER ( ORDER BY TransactionDate ) AS Rn
FROM dbo.Track
SELECT T1.Installed AS Part ,
T1.TransactionDate AS [Installed Date] ,
T2.TransactionDate AS [Removerd Date]
FROM NewTrack AS T1
LEFT JOIN NewTrack AS T2 ON T1.Installed = T2.Removed
AND T2.Rn = T1.Rn + 1
ORDER BY Part ;
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