ACCESS FEED: RE: [MS_AccessPros] Confusion with use of "Is Null" and :Nz"

Minggu, 18 September 2011

RE: [MS_AccessPros] Confusion with use of "Is Null" and :Nz"

Where is your data coming from? It should really be cleaned up at the source. If you expect either a good Phone or nothing, you could run an update query to replace all PhoneAH with null where the len() of PHoneAH <=3.

Duane Hookom
MS Access MVP

To: MS_Access_Professionals@yahoogroups.com
From: robinski@mymail.net.au
Date: Sun, 18 Sep 2011 17:18:21 +1000
Subject: RE: [MS_AccessPros] Confusion with use of "Is Null" and :Nz"

Thanks Douane,

We have a result which I do not understand.

Your 'Result' below is "Result2" in the image at:

http://www.rotary9790.org.au/test/test.asp

The 'Wdth' result which shows "3" I have proven to be three unseen
characters. I can backspace them out and the result is a nil entry.

How do I lose those with a query?

Many thanks,

Robin Chapple

At 18/09/2011 01:08 PM, you wrote:

>Add this column:
>Wdth: Len(PhoneAH)
>You can try
>Result: IIf(Len(Trim([PhoneAH]))=0,"Unknown",Format([PhoneAH],"@;""ZLS"""))
>
>Duane Hookom
>MS Access MVP
>
>Douane,
>
> From your remark about "zero-length-string" I have now found some
>advice on the Microsoft site and added this to my query:
>
>Result: IIf(IsNull([PhoneAH]),"Unknown",Format([PhoneAH],"@;""ZLS"""))
>
>I have added an image to the page:
>
><http://www.rotary9790.org.au/test/test.asp>http://www.rotary9790.org.au/test/test.asp
>
>
>and the result is unexpected!
>
>Many thanks,
>
>Robin Chapple
>
>At 18/09/2011 10:42 AM, you wrote:
>
> >Robin,
> >If the PhoneAH is truly null then I think all you need is:
> >Phonz: [PhoneAH] + " AH"
> >
> >Is it possible the field might be a zero-length-string or something
> >you can't see?
> >
> >Duane Hookom
> >MS Access MVP
> >
> >
> >
> >
> >
> >To: MS_Access_Professionals@yahoogroups.com
> >From: robinski@mymail.net.au
> >Date: Sun, 18 Sep 2011 09:28:53 +1000
> >Subject: [MS_AccessPros] Confusion with use of "Is Null" and :Nz"
> >
> >
> >
> >
> >
> >
> >I have been advised about the use of Nz but he code to use has ben supplied.
> >
> >I have not learned!
> >
> >This code in a query:
> >
> >Phonz: IIf([PhoneAH] Is Null,"",([PhoneAH] & " AH"))
> >
> >still gives AH in cases where I have dirty data.
> >
> >I Have learned that this is wrong:
> >
> >Phonz: IIf([PhoneAH] Is Null,"",(Nz[PhoneAH] & " AH"))
> >
> >Where is the correct place to use the Nz?
> >
> >Many thanks,
> >
> >Robin Chapple
> >
> >
> >
> >
> >
> >
> >[Non-text portions of this message have been removed]
> >
> >
> >
> >------------------------------------
> >
> >Yahoo! Groups Links
> >
> >
> >
>
>
>
>
>
>
>[Non-text portions of this message have been removed]
>
>
>
>------------------------------------
>
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>