Delete rows with NULL values - SQL Server Forums

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Transact-SQL (2000)

Delete rows with NULL values

Author

Topic

waxdart23
Starting Member

33 Posts

Posted - 2004-06-18 : 07:09:16

I have a table from which I wish to delete rows where a certain column is either NULL or contains the word "memo". I am using the follwing code:

DELETE FROM MASTER_ACCOUNT_MEMO WHERE isnull(MEMO, '') = NULL
GO
DELETE FROM MASTER_ACCOUNT_MEMO WHERE (MEMO = '%memo%')
GO

I have tried various versions of the code above, such as:

DELETE FROM MASTER_ACCOUNT_MEMO WHERE (MEMO = NULL)
GO
DELETE FROM MASTER_ACCOUNT_MEMO WHERE MEMO = '%memo%'
GO

When I run it, no rows are affected.
Any ideas would be appreciated.

Thanks
P

mr_mist
Grunnio

1870 Posts

Posted - 2004-06-18 : 07:20:54

[code]DELETE FROM MASTER_ACCOUNT_MEMO WHERE MEMO is null or memo like '%memo%'[/code]

Should do it. I'd test that as a SELECT first though.

-------
Moo. :)

waxdart23
Starting Member

33 Posts

Posted - 2004-06-18 : 07:24:09

Worked a treat. Thanks very much mr_mist!

Thanks
P

drymchaser
Aged Yak Warrior

552 Posts

Posted - 2004-06-18 : 09:11:53

For empty strings which are not NULL you could test this.

DELETE FROM MASTER_ACCOUNT_MEMO WHERE NULLIF(RTRIM(MEMO),'') is null or memo like '%memo%'

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