select * rows has no Childe

Dear all,
I need to get all records that has no reference in same table?

DicWords: DicWordID - ParentDicWordID

I need to list all records in Words where DicWordID not in ParentDicWordID
I use this:
select * from DicWords
where DicWordID not  in (select ParentDicWordID from DicWords  )
 
another saying : select all records has no Childe
thanks
ethar1Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
The select statement you posted meets the requirements as you state them, so please clarify what you're trying to pull off here.  Some mockup data would be helpful.

>I need to list all records in Words
Is Words a separate table?
0
ethar1Author Commented:
Words is same DicWords
when I use :
select * from DicWords
where DicWordID not  in (select ParentDicWordID from DicWords  )
it return nothing
where :
 select * from DicWords where DicWordID=878251 return a record
and
 select * from DicWords where ParentDicWordID=878251 return nothing
0
ethar1Author Commented:
I just need delete all records like DicWordID= 4082
it has no Childe
Untitled-1.png
0
Scott PletcherSenior DBACommented:
Be sure to exclude any NULL value from NOT IN, as a NULL value can cause a NULL result:

SELECT *
--DELETE FROM DicWords
FROM DicWords
WHERE
    DicWordID NOT IN ( SELECT ParentDicWordID FROM DicWords  WHERE ParentDicWordID IS NOT NULL )
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
ethar1Author Commented:
Thanks
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server

From novice to tech pro — start learning today.