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Simple SQL Select question

Posted on 2007-04-09
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Last Modified: 2013-12-24
I have a table that has a RecStatus field in it.  For certain record types, the RecStatus is empty.
When I run the sample queries below, only the records with a RecStatus <> Imported or Pursuing are returned. (ie. RecStatus=Maintaining or New are returned)  The records where RecStatus is empty are also not returned.  Can someone tell me why?  Can someone tell me how to fix?  I need the empty RecStatus records as well.

Sample 1:
<cfquery name="sqlAccounts" datasource="#Request.SomeDSN#">
SELECT * FROM tblAccts WHERE RecStatus <> 'Imported' AND RecStatus <> 'Pursuing'
</cfquery>
Sample 2:
<cfquery name="sqlAccounts" datasource="#Request.SomeDSN#">
SELECT * FROM tblAccts WHERE RecStatus NOT IN('Imported','Pursuing')
</cfquery>
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Question by:sulzener
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2 Comments
 
LVL 3

Accepted Solution

by:
JipFromParis earned 500 total points
ID: 18878038
I assume the RecStatus column allow NULL values. NULL values never match any predicate in a WHERE clause, albeit the IS NULL predicate. So, you should rewrite the first request as :

SELECT * FROM tblAccts WHERE (RecStatus <> 'Imported' AND RecStatus <> 'Pursuing') OR (RecStatus IS NULL)
0
 

Author Comment

by:sulzener
ID: 18878550
Thanks ... Not sure that has ever registered with me before.  Thanks for clearing that up.
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