Apply And operator on same column

Question

Apply And operator on same column

shirish1987

Right there with Babe

Points: 776
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June 11, 2015 at 2:20 am

#318191

Hi,
I have one table NewsEntities which contains one to many relationship.ie. One NewsId can have multiple EntityId.
Consider,NewsId=1 has two entities with EntityId 1 and EntityId 2 .there multiple newsid which can same or different EntityId
Now i want to find those news in which EntityId=1 is Present but EntityId=2 is absent
kindly provide solution.
Thanx and Regards
Shirish Phadnis

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Neil Burton SSC-Insane Points: 23045 More actions · Answer 1

shirish1987 (6/11/2015)
Hi,
I have one table NewsEntities which contains one to many relationship.ie. One NewsId can have multiple EntityId.
Consider,NewsId=1 has two entities with EntityId 1 and EntityId 2 .there multiple newsid which can same or different EntityId
Now i want to find those news in which EntityId=1 is Present but EntityId=2 is absent
kindly provide solution.
Thanx and Regards
Shirish Phadnis

If you could post some sample data it will be much easier to give you an answer. I think I know what you mean but I'm not sure.

On two occasions I have been asked, "Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?" ... I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.
—Charles Babbage, Passages from the Life of a Philosopher

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tindog SSCarpal Tunnel Points: 4892 More actions · Answer 2

Are you after something like this?

SELECT DISTINCT ne.NewsID

FROM NewsEntities ne

LEFT JOIN (SELECT DISTINCT NewsID FROM NewsEntities WHERE EntityID = 2) tne ON tne.NewsID = ne.NewsID

WHERE ne.EntityID = 1

AND tne.NewsID IS NULL

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 3

CREATE TABLE #NewsEntities (NewsEntity INT NOT NULL identity(1,1), NewsId INT, EntityId INT)

INSERT INTO #NewsEntities (NewsId, EntityId)

VALUES

(1,1),(1,2),(1,3),

(2,1),(2,5),(2,3),

(3,5),(3,2),(3,3)

SELECT n.NewsId

FROM #NewsEntities n

WHERE EntityId = 1

AND NOT EXISTS (

SELECT 1

FROM #NewsEntities ni

WHERE ni.NewsId = n.NewsId AND ni.EntityId = 2)

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

shirish1987 Right there with Babe Points: 776 More actions · Answer 4

Consider following data

NewsId EntityId

1 1

1 2

2 1

3 2

So I want those news which has EntityId=1 is assigned but not EntityId=2

shirish1987 Right there with Babe Points: 776 More actions · Answer 5

Thanx all for your solution.

Thanx and Regards

Shirish Phadnis

David Burrows SSC Guru Points: 65144 More actions · Answer 6

Bit late

SELECT NewsId

FROM #NewsEntities

WHERE EntityId IN (1,2)

GROUP BY NewsId

HAVING SUM(EntityId) = 1

Far away is close at hand in the images of elsewhere.
Anon.

Luis Cazares SSC Guru Points: 183706 More actions · Answer 7

Do you mind if I join the party?

SELECT n.NewsId

FROM #NewsEntities n

WHERE EntityId = 1

EXCEPT

SELECT n.NewsId

FROM #NewsEntities n

WHERE EntityId = 2

Luis C.
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Apply And operator on same column

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