How do I select only one row that have two different values in same column

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Hi All,
I need your help for SQL. I have a table like;

ID TestID Status
1 2 PASS
1 2 FAIL
2 3 FAIL
2 3 PASS
3 4 FAIL
4 5 PASS

I want to return only one row for each ID. If ID has fail, return only record with fail so the outout should look like;

ID TestID Status
1 2 FAIL
2 3 FAIL
3 4 FAIL
4 5 PASS

What I have tried:

I have tried using CTE and Temp delete and its working fine but I wanted to do the same using Joins;

Create table #tmp
(
Id Int,
grpid int,
pass varchar(10)
)

Insert into #tmp (Id,grpid,pass)
Values (1,2,'Pass'),
(1,2,'Fail'),
(2,3,'Fail'),
(2,3,'Pass'),
(3,2,'Pass'),
(4,2,'Fail')

--Select * from #tmp

;WITH TempEmp (Id,grpid,pass,duplicateRecCount)
AS
(
SELECT Id,grpid,pass,ROW_NUMBER() OVER(PARTITION by Id,grpid ORDER BY pass)
AS duplicateRecCount
FROM #tmp
)
Select * into #tmp1 from TempEmp

Select * From #tmp1

--Now Delete Duplicate Records
DELETE FROM #tmp1
WHERE duplicateRecCount > 1

Select * From #tmp1

Posted 3-Nov-17 0:34am

Member 13057140

Updated 17-Nov-17 11:18am

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Comments

Tomas Takac 3-Nov-17 11:18am

You don't need to insert into #tmp1 and delete. Simply SELECT Id,grpid,pass from TempEmp WHERE duplicateRecCount = 1. Alternatively you could do this using union.

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CHill60 · Answer 1 · 2017-11-21T23:37:00

As @Tomas-Takac stated, you don't need to use #tmp1 and delete, just do something like

SQL

WITH TempEmp (Id,grpid,pass,duplicateRecCount)
 AS
 (
	SELECT Id,grpid,pass, 
	  ROW_NUMBER() OVER(PARTITION by Id,grpid ORDER BY pass) AS duplicateRecCount
	FROM #tmp
 )
 Select Id,grpid,pass from TempEmp WHERE duplicateRecCount = 1

But you said you wanted to use a Join. One way could be to use the contents of your CTE as a sub-query. e.g.

SQL

SELECT A.Id, A.grpid, A.pass
FROM #tmp A
INNER JOIN (SELECT Id,grpid,pass,ROW_NUMBER() OVER(PARTITION by Id,grpid ORDER BY pass) 
          AS duplicateRecCount FROM #tmp) 
   as B ON B.duplicateRecCount = 1 AND A.Id = B.Id AND A.pass = B.pass