IIf And Isnull In Expression Builder

Basically i have a drop down that i want controlling the Criteria for each field in my query to have an advanced search. If i leave a field blank the query comes up with nothing so i tried this:


IIf(IsNull([Forms]![Inventory Report Search]![Model]),Is Null,[Forms]![Inventory Report Search]![Model])

this is not working. it is still returning the query blank. if i put valid critera in the dropdown it comes back Fine.how do i make is so if a field is blank it will return it as null or not even there.

Note: also tried this;

Forms]![Inventory Report Search]![Model] Or Forms]![Inventory Report Search]![Model] Is Null

works, But comes back as too complex after a few searches and when i open the query there is a million or's in there. so that wont work.

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Writing An Expression In The Expression Builder

Good day all

Heres what im trying to do:

in one textfield i have =Count(*)

this returns all the records in my db.

now i want to split it up. i want to count all the records for each month.
my field name is datein_now but its just a normal textfield and not a date field.
example in field: 05/02/02 10:24:31 AM.
also got a datein textfield:05/02/02
i had
Count(*) where datein_now between 05/05/01 and 05/05/31

please help

lee

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Help With Expression Builder

When I enter a date into the [Return Text Date] field on my table and then select a value from the [Upgrade Fee] combo box followed by a selection from the [Upgrade Investment Class] combo box i want the value (or Date) in my Eligibility Date field to be amended by the given amount.

I have an expression, listed below, that i want to repeat (copy + Paste would be good) and amend the values. I have entered 2 and that seems to be all it will allow. I want to have 30 possible permutations to the fields 0 - 300 (in 50 intervals) by 5 (1,2,3,4 & 5)

The Code works below but I cant have anymore code in the expression builder

IDEAS please people.......

=IIf([Upgrade Fee]=0 And [Upgrade Investment Class]=1,[Return Text Date]+180,IIf([Upgrade Fee]=0 And [Upgrade Investment Class]=2,[Return Text Date]+150,""))IIf([Upgrade Fee]=0 And [Upgrade Investment Class]=3,[Return Text Date]+120,IIf([Upgrade Fee]=0 And [Upgrade Investment Class]=4,[Return Text Date]+90,""))

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Hi!

I need some help.

I want to create a formula (using expression builder or something else) who will separate the word id=276616652 lang=FR temp=80 in a new column (for each word)

Id=276616652&Lang=FR&Client=Diesel649&Temp=80

by the way, im using this in a log database

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I've built a query against a form and included a calculation to give me the average sum which looks like this :

=Sum([data field])/31*12.5

This work fine however, what is the best way to overcome the different number of days in the month ie; 28, 30 and 31? I've looked at the Expression Builder but getting lost :rolleyes:

Regards

Richard

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Hi all,
i have a field that uses Date/Time as the data type and what i want to do is to create records that only have the time between the hours of 9:00am and 9:15pm.... i think i need to use the expression builder for this, but im not really sure on the expression to use.. any ideas ???:confused:

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Hi,
I am fairly new to Microsoft Access and can't get to grips with the expression builder. I have several fields where I need to add validation rules and no matter what I try I can't seem to get it right. E.g I'm trying to set a validatio rule for only allowing locations into a certain field. Could someone please give me some help or point me in the direction of a good guide?

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Hi, i am making a stock control program in Access. I have designed several tables, forms and queries etc. but have come stuck at the point where i want to create a button so when i click it, it automatically changes the stock level of all the products that are low in stock, to their "target stock level".

I am confused about how to do this. I tried making a button and going into the expression builder and putting:

=[Product Stock Level]=([Product Target Stock]-[Product Stock Level])+[Product Stock Level]

This would basically change the stock level to the target stock level. But when i press the button, nothing happens.

Any help on this matter is greatly appreciated.

Thanks alot.

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Im looking for a guide to teach myself how to use the expression builder.

I know how to write constraints in SQL, so with a bit of luck it will be similar. :P

A list of every command you can use might be just as good as a tutorial.

Can anyone point me in the right direction?

Thanks.

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Expression Builder IIF Problem.

Hi,

I am trying to write an expression in my query which, given a condition, it uses the following criteria:
"Carmarthenshire" Or "Ceredigion" Or "Neath Port Talbot" Or "Pembrokeshire" Or "Swansea"

So far I have come up with this:
IIf([Forms]![Main Menu]![cboRegion]="West Wales","Carmarthenshire" Or "Ceredigion" Or "Neath Port Talbot" Or "Pembrokeshire" Or "Swansea")

However the Query builder complains the expression is incorrect or too complex etc. etc...

If I simplify it to this:
IIf([Forms]![Main Menu]![cboRegion]="West Wales","Carmarthenshire")
it works fine but unfortunately this isn't what I need.

Any help much appreciated,

Matt.

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Expression Builder IIF Issue

Hi all,

Should you write an expression the criteria field in a query and use IIF, an interesting little bug appears that I have not managed to get around. Should you want the expression to return a range as the criteria (i.e. Between ... And ... ) it can't do it because IIF tries to evaluate the range before it passes the result back to the query. I need it to actually pass the Between And to the query to use as it's criteria. It can't do this, so it passes back a null and of course the query fails to produce any meaningful result.

I need to do this as I have two date text boxes in a form so that people can search through specific dates, but in the table these date fields can be blank. (Basically it's a Date Completed field, so if the job hasn't been completed, the date is left as Null) So i need users to be able to leave both text boxes blank so that the resulting query will display the Null values as well. If they leave one blank, it auto sets itself to the a minimum/maximum date. When both boxes are blank i need to return nothing so the criteria is effectively blank or = Is Null And Is Not Null to display all records.

Example of WIP

IIf(IsNull([Forms]![frmListImgChng]![txtDateComp1])=True And IsNull([Forms]![frmListImgChng]![txtDateComp2])=True,#15/01/2007#,IIf(IsNull([Forms]![frmListImgChng]![txtDateComp1])=True,Between #01/01/2007# And #01/04/2007#,IIf(IsNull([Forms]![frmListImgChng]![txtDateComp2])=True,Between [Forms]![frmListImgChng]![txtDateComp2] And #31/12/2030#,Between [Forms]![frmListImgChng]![txtDateComp1] And [Forms]![frmListImgChng]![txtDateComp2])))

The red bits of code are test values. The first one passes back to the query as it is not a range, the second does not as it is.

Cheers,

Matt

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This seems so simple and it probably is, I've probably been staring at my database for too long doing too many other things but here goes:

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Thanks

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I need to implement the following logic in a report column:

IF hist_mis_cds!typgess = "", then calculated field= ""
ELSE
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then calculated field= "X"
ELSE calculated field= ""

I have implemented the following query in Expression Builder for the calculated field:

=IIf(HIST_MIS_CDS!TYPGESS="","",IIf(HIST_MIS_CDS!T YPGESS<>HIST_CODE_TRANSLATION!SRC_CODE_DESC,"X","" ))

When I click on Form View, I get "#Name?" in the calculated field.

Any ideas? Thanks.

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Error In Query In Expression Builder...

I need to implement the following logic in a report column:

IF hist_mis_cds!typgess = "", then calculated field= ""
ELSE
IF hist_mis_cds!typgess <> hist_code_translation! src_code_desc
then calculated field= "X"
ELSE calculated field= ""

I have implemented the following query in Expression Builder for the calculated field:

=IIf(HIST_MIS_CDS!TYPGESS="","",IIf(HIST_MIS_CDS!T YPGESS<>HIST_CODE_TRANSLATION!SRC_CODE_DESC,"X","" ))

When I click on Form View, I get "#Name?" in the calculated field.

Any ideas? Thanks.

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thanks

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Hi all!

I need to write an expession in the Expression Builder but I cant seem to get it correct. Here is what I want to do:

I have 2 forms and 1 query.

I want the criteria for my query to take the data from the loaded form, ie if form1 is loaded then take the value in field1/form1 as criteria, otherwise, if form2 is loaded then take the value in field2/form2 as criteria.

Form1 and form2 are never loaded at the same time.

Can someone give me a suggestion? Thanx for your help

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Thanks!

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Hi,

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having a bit of trouble trying to create an expression.
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I tried to write the expression anyway: =[AmountUsed]/[AmountIssued]

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if anyone can help, I'd greatly appreciate it,

thanks,

Stephen

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Thanks So Much
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I apologize if this is the wrong forum for this question but I was not sure where to post.

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I want the query to take two dates (text01 and text02) from a form and run a date range check. So, the criteria has to be equal to the two dates or inbetween them. I know the logic behind this, but I cannot get the correct syntax. I am pretty sure this is an easy formula, but I need someone to help me get started in learning the syntax of the expression builder.

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This doesn't work:

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