<cfparam name="form.field" default=""> not producing desired results

i'm creating a little search function here. it works perfectly when i use

<cfparam name="form.LastName" default="">
<cfparam name="form.FirstName" default="">

with

<cfquery name="summary" datasource="lacma">
SELECT LastName, FirstName, Suffix, City, Zip, Spec FROM Doctordat WHERE 1=1 and LastName
LIKE '%#trim(form.Lastname)#%' and FirstName
LIKE '%#trim(form.FirstName)#%'
 ORDER BY LastName ASC
</cfquery>

but when i add

<cfparam name="form.Zip" default=""> and

<cfquery name="summary" datasource="lacma">
SELECT LastName, FirstName, Suffix, City, Zip, Spec FROM Doctordat WHERE 1=1 and LastName
LIKE '%#trim(form.Lastname)#%' and FirstName
LIKE '%#trim(form.FirstName)#%' and Zip
LIKE '%#trim(form.Zip)#%'
 
 ORDER BY LastName ASC
</cfquery>

to the mix and leave all fields empty, my results do not include records where the Zip field in the db is Null.  So my search results only include records that have zip codes. i want to return all records (inc. the ones w/o zip codes.
phillystyle123Asked:
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jyokumCommented:
you could probably just change it to

and (Zip LIKE '%#trim(form.Zip)#%' OR Zip IS NULL)
0
phillystyle123Author Commented:
jyokum thanks for fielding this question - i thought everyone on earth was gone for the weekend.

Looking at the ?I think you answered it completely -so, thanks and i'm giving you the pts- i just wanted to clarify what i'm actually trying to do here:

and (Zip LIKE '%#trim(form.Zip)#%' OR Zip IS NULL)

works -  my only prob. is that won't it give me both the "LIKE" results and AND the Zip is Null Results?  I want this if the field is blank but i don't want the null results if i fill in the Zip field.  with your code the way it stands if i search for a 91406 (zip code) i'll get 91406 results and any records that have a null zip code field.

so can i change it to:

<cfif form.Zip is "">(Zip LIKE '%#trim(form.Zip)#%' OR Zip IS NULL)<cfelse>Zip LIKE '%#trim(form.Zip)#%' </cfif>




0
jyokumCommented:
just use this then

<cfif len(trim(form.Zip))>
AND Zip LIKE '%#trim(form.Zip)#%'
</cfif>
0

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