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Counting NULL

Author

Topic

harlingtonthewizard
Constraint Violating Yak Guru

352 Posts

Posted - 2008-10-08 : 01:52:31

If I have a result as below how do I count the number of EventCommentID where IS NULL? So result should be 8.

EventCommentID
1
2
4
3
NULL
5
6
NULL
NULL
NULL
NULL
NULL
NULL
NULL

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2008-10-08 : 01:55:20

[code]SELECT SUM(CASE WHEN EventCommentID IS NULL THEN 1 ELSE 0 END) AS NullCount
FROM Table[/code]

bjoerns
Posting Yak Master

154 Posts

Posted - 2008-10-08 : 06:14:24

Hi Visakh, why not

SELECT COUNT(*)
FROM Table
WHERE EventID IS NULL

works for me...

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2008-10-08 : 06:20:53

even this will do

SELECT COUNT(*)-COUNT(EventID)
FROM Table

bjoerns
Posting Yak Master

154 Posts

Posted - 2008-10-08 : 06:39:49

Evil one. But my execution plan is shorter.

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