Solved

Using Dlookup with multiple fields to display one field

Posted on 2013-10-30
13
308 Views
Last Modified: 2013-11-04
I have a Table [IEGDate] with 4 primary key fields; [Effective], [HHSize], [Frequency], [IncomeType] with a  non-primary key field [IncomeThreshold].

I also have a form [IEChild], with fields [HHSize], [HHIncome] and [Frequency].  I need to lookup these 3 fields in the [IEGDate] table and return the [IncomeType] on this form.  The [HHIncome] field would correspond with the [IncomeThreshold].  In summary, the fields [HHSize] and [Frequency] must match and the [HHIncome] must be equal to or less than the [IncomeThreshold] to display the [IncomeType].  If the [HHIncome] is greater than the [IncomeThreshold], display "No".

Can you assist?
0
Comment
Question by:softsupport
  • 6
  • 6
13 Comments
 
LVL 31

Expert Comment

by:Helen_Feddema
ID: 39612568
I think you would be much better off doing this filtering in a query used for the form's record source, or possibly a subform.  It is a lot easier to work with filters and calculations in the Query Designer, as opposed to the control source of a textbox on a form.
0
 

Author Comment

by:softsupport
ID: 39612646
I would like to use the DLookup feature, ( or some other lookup) to search the table and display results, if it is possible.
0
 
LVL 30

Expert Comment

by:hnasr
ID: 39612886
This looks up one field "Entity" in table "comma"  with condition of 2 fields Year and Case:

 DLookup("Entity", "comma", "[Year]='" & Me.Year & "' AND [Case]='" & Me.Case & "'")

"Using Dlookup with multiple fields to display one field"
Multiple fields go in the where condition.
0
 

Author Comment

by:softsupport
ID: 39613680
Thank you for the Dlookup example above, but I would like to lookup 3 fields, returning 1.
0
 
LVL 30

Expert Comment

by:hnasr
ID: 39615378
"Thank you for the Dlookup example above, but I would like to lookup 3 fields, returning 1. "

Do you mean if we have a table x(a, b, c, d)
a b c d
1 1 1 b
1 1 2 c
2 2 2 d

If you look for record with 1, 1, 1 do you expect to report back the value b?
Using a where clause will report the same result.

So what exactly you are looking for?

Talk as you would tell some one over the phone what to do to get the expected result.
0
 

Author Comment

by:softsupport
ID: 39616756
In a form [Family], I have 3 fields, [HSize], [HIncome], [Frequency]

In a table [IEG]I have 4 fields [HSize], [IncomeThreshold], [Frequency], [Type]

I would like the database to compare the fields in [Family] table to fields in [IEG] table.

[Family]![HSize] must equal [IEG]![HSize]
[Family]![Frequency] must equal [IEG]![Frequency]
[Family]![HIncome] must be less than or equal to [IEG]![IncomeThreshold]

If it meets all 3 criteria, display the [IEG]![Type], if not display N.


Hope this clarifies my request.
0
U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

 
LVL 30

Assisted Solution

by:hnasr
hnasr earned 500 total points
ID: 39617999
Yes this is the same case, look for [IEG]![Type]

DLOOKUP ("[Type]", "IEG", " [IEG]![HSize]='" & [Family]![HSize] & "' AND [Frequency]='" & [Family]![Frequency] & "' AND  [IncomeThreshold] >='" & [Family]![HIncome] &"'")

Remove single quotes  if fields are numeric.
0
 

Author Comment

by:softsupport
ID: 39620563
Works perfectly, except

 "If it meets all 3 criteria, display the [IEG]![Type], if not display N."
Can I display on the [Family] form
0
 
LVL 30

Expert Comment

by:hnasr
ID: 39620642
Nz(DLOOKUP ("[Type]", "IEG", " [IEG]![HSize]='" & [Family]![HSize] & "' AND [Frequency]='" & [Family]![Frequency] & "' AND  [IncomeThreshold] >='" & [Family]![HIncome] &"'"),"N")
0
 

Author Comment

by:softsupport
ID: 39620662
And to show on family form?  Use unbound field?
0
 
LVL 30

Accepted Solution

by:
hnasr earned 500 total points
ID: 39620672
"And to show on family form?  Use unbound field? "

Yes, you may use it in proper place:

TxtBox1 = Nz(DLOOKUP ("[Type]", "IEG", " [IEG]![HSize]='" & [Family]![HSize] & "' AND [Frequency]='" & [Family]![Frequency] & "' AND  [IncomeThreshold] >='" & [Family]![HIncome] &"'"),"N")

Or you may set the control source for a TextBox as =Nz(DLOOKUP ("[Type]", "IEG", " [IEG]![HSize]='" & [Family]![HSize] & "' AND [Frequency]='" & [Family]![Frequency] & "' AND  [IncomeThreshold] >='" & [Family]![HIncome] &"'"),"N")
0
 

Author Closing Comment

by:softsupport
ID: 39622383
Thank you so very, very much!!!
0
 
LVL 30

Expert Comment

by:hnasr
ID: 39623226
Welcome!
0

Featured Post

Backup Your Microsoft Windows Server®

Backup all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

User Beware!  This is a rather permanent solution to removing your email from an exchange server.  The only way to truly go back is to have your exchange administrator restore your mailbox from backups.  This is usually the option of last resort.  A…
Deploying a Microsoft Access application in a Citrix environment is not difficult but takes a few steps. However, Citrix system people are often of little help, as they typically know next to nothing about Access. The script provided here will take …
The viewer will learn how to use a discrete random variable to simulate the return on an investment over a period of years, create a Monte Carlo simulation using the discrete random variable, and create a graph to represent the possible returns over…
The viewer will learn how to create a normally distributed random variable in Excel, use a normal distribution to simulate the return on an investment over a period of years, Create a Monte Carlo simulation using a normal random variable, and calcul…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now