Convert Null To 0

Dec 20, 2007

Hi Guys, i have a problem in converting NULL to 0 , i wrote a query which gave me a Null value, But i would like to know if there is any way i can change the NUll value to 0.

ex
SELECT Sum(xxxx) AS yyyy FROM zzzzz WHERE******=#####;

i got NULL.
I need to get 0 instead of Null.

Plz help

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Convert 0 (zero) To Null

Apr 23, 2007

Hi.
I have a db with a numeric field called Eur_2.
This field is populated with data imported from an excel file.
When the Eur_2 excel field contain Null, in the correspondent Access Field the value inserted is 0 (zero).
I have necessity to put in the Access field Null value.
The VBA code that I use for import is:

Eur_2 = XL.Application.Cells(indriga, indcolonna + 10)
If Eur_2 = 0 Or _
Eur_2 = Empty Then
Eur_2 = Null
End If

but when i open the Access table, the value inserted is 0 (zero).
There's something to do for change 0 (zero) to Null?

Thanks
Luigi

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Sep 20, 2005

Hi,

I would like to convert zero if enter into null value during the data entry phase in a form. This means that zero values will be stored as null values. Is there a way? I am not able to do it in the input mask somehow.

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Apr 29, 2008

Simple query, but I need to roll the results up with others and a null return is hurting me. I have been chasing my tail around with the nz(), input masks, IIF statements, only to prove my ignorance and possible insanity for expecting different results.

Here we go:

SELECT Count([LDB LOG].DSTHTL) AS ["tot120"]
FROM [LDB LOG]
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HAVING ((([LDB LOG].[T-7 Date]) Is Null));

This is being used to count open items into age buckets, the above is the greater than 120 days (discounting anything prior to 2008). If the T-7 Date is null the item is open. What is happening is that no records are being selected, resulting in the null value back.

Any help would be greatly appreciated as I have spent an unrealistic amount of time on this.


Thanks
Brendan

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May 22, 2015

I have a query which returns, among other things, a number of boolean fields. In some cases, there will be a genuine True or False value in each of these fields; in others, it can and should be Null (e.g. as a result of a 'failed' LEFT JOIN of some description, where there is no associated record in the joined table which fulfills the criteria)

So something like this :

Code:
SELECT [tblTable2].[fldBooleanField]....
FROM [tblTable1]
LEFT JOIN [tblTable2]
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However, I will be writing the result of the query to a text file and here's the problem. I want to show a numeric value for a genuine True / False (i.e. -1 and 0 respectively using the standard boolean conversions in Access) and a blank for any Null values.

So I tried this :

Code:
SELECT CInt([tblTable2].[fldBooleanField]) AS fldBooleanField....
FROM [tblTable1]
LEFT JOIN [tblTable2]
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However, currently when I look at the exported recordset in Notepad, I am getting 0's for both False and Null values (and -1 for True)

How I can adapt my query to keep Nulls...null? And convert the genuinely present boolean values to integer form?

Only thing I can think of is to use (untested) :

Code:
IIf([tblTable2].[fldBooleanField] Is Null, Null, CInt([tblTable2].[fldBooleanField]))

But there's a number of boolean fields in there, all requiring the same treatment.

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I do not understand what is happening here. I have foll0wing line in a calculated query field:

m: Switch([EmpID]<5,1) ' run Query 18 in attached example, A2007/2010

this produces 1 for all EmpID<5 and Null for all other EmpID's. All as expected.

But if I do this:

m: Switch([EmpID]<5,1,[EmpID]>=5,Null) ' run Query 19 in attached example

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Jul 5, 2013

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Code:
Private Sub cmdUpdateDates_Click()
'###################################
'This sub aims at combining the timesheet date and the start and end time into the fields [Start Time] and [End Time].
'###################################
Dim intCounter As Integer
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Dim rs As ADODB.Recordset

[Code] ....

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Apr 18, 2006

Hello all,

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Thanks.

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Nov 16, 2006

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e.g
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Nov 16, 2007

I think the title pretty much sums it up....

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I know there are records containing null values in the second field, as I have run a select query with the criteria: Like "*", to make sure they are null, and not zero-length-strings.

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