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sql delete question

Posted on 2006-07-15
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Last Modified: 2010-05-18
this connn.execute"delete from table where column = ' ' "
or connn.execute "delete from table where column = null"


both of these are not deleting?
I checked the table and that column is null?
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Question by:thenone
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5 Comments
 
LVL 96

Expert Comment

by:Lee W, MVP
ID: 17116005
DELETE FROM Table WHERE Column IS NULL
0
 
LVL 8

Author Comment

by:thenone
ID: 17116029
and what if it is "" or contains a . that I want to delete same thing?
0
 
LVL 96

Expert Comment

by:Lee W, MVP
ID: 17116068
Add some ORs.

DELETE FROM Table WHERE Column IS NULL OR Column = '' OR Column = '.'

0
 
LVL 96

Accepted Solution

by:
Lee W, MVP earned 2000 total points
ID: 17116073
Frankly, I don't delete data from my tables.  I use tables that relate to each other on IDs and if I were to delete a row, I could end up messing up my database.  Instead, I create a field of bit type called "Del" - then I set Del = 0 for not deleted and Del = 1 for deleted.  Then in my criteria searches I just throw in to the WHERE clause ... AND Del = 0.  No accidental PERMANENT deletions this way.
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LVL 8

Author Comment

by:thenone
ID: 17116295
oh ok so if the column is blank then = ' ' would work thanks its only when its null do you need to do is null.
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