Solved

# Another calculation for Tree database: getting the figures from another form

Posted on 2013-11-21
231 Views
As long as this site keeps giving points to the person who answers me, I can keep asking right?  :)

Again, I tried some things but couldn't get anywhere on this one.  On a positive note I still continue to add things myself by figuring them out.

On frmLogs I added the column "Gross".  This calculation works and is Footage * Grade.

I need to add this Gross column up and put it on frmTrees.  Here:

I cannot figure out how to get access to the calculation of "=[txtFootage]*[cboGrades]" in frmTrees.

Other Notes
In frmTrees, with your help, there is a dsum that adds the total log footage which is right and good.  I cannot just take that total and multiply it by something, because that something is different for each log.  See first picture, the multiplier is different.

Sample Result
For example.  Screenshot one has the gross of 320.0 and 23.8.  I need to add 320.0 and 23.8.  So that equals 343.8.  That number, 343.8, needs to go in  the Gross column for Tree # 4 in frmTrees.  Like so:

Hopefully I have gave all the information needed.  Please let me know if you need anymore information.

and Thank you!
Database1683--2-.accdb
0
Question by:getwidth28
• 5
• 4

LVL 61

Accepted Solution

mbizup earned 500 total points
ID: 39666728
Try this as the control source, including the  = .

``````=DSum("Grade * Footage","tblLogs","TreeID = " & [TreeID])
``````

Same principal.  You're summing the product of Grade and Footage for a given tree ID.
0

LVL 61

Expert Comment

ID: 39666745
For the type of data you are trying to pull, again I highly recommend reading Jim Dettman's article:

http://www.experts-exchange.com/Microsoft/Development/MS_Access/A_12-Dlookup-and-the-Domain-Functions.html

It focuses largely on DLookup, but the same principles also apply to all of the domain functions (DSum, DMax, DAvg, etc).
0

Author Comment

ID: 39667013
Shucks, I forgot to read that.  I will right now, then try your answer.
0

Author Comment

ID: 39667080
I understood the article fully.  What is a little confusing is how does Access know to use the Grade and Footage value from the frmLogs form vs. the tblLogs table.  There is not footage or grade column in the table.

??

BTW: It worked perfectly, again.  Thank you
0

LVL 61

Expert Comment

ID: 39667111
DSum, DLookup, etc allow you to look at sources off of the form... in this case, the Trees form does not have the needed data, so you want to query the Logs table  -- which has Grade and Footage.

The DSum command lets you do that, and also allows you to use criteria from the form in the sum.
0

Author Comment

ID: 39667341
I was wrong.  It seemingly worked at first but then after I added another tree, the "Total Gross" stays the same and doesn't cycle through the other trees and add them.

The total shown is simply the record selected.  If I select the top record (Tree #2) the "Total Gross becomes 67.1.  If I select the other record (Tree # 1) the "Total Gross" becomes 18.

0

LVL 61

Expert Comment

ID: 39667513
I thought this question was about populating txtGross in the continuous form as you showed with the red number in the image in your original post.  ?

Is this a new/follow up question, or was that not what you were looking for?
0

LVL 61

Expert Comment

ID: 39667517
The Total Gross textbox was not in the sample you posted.
0

Author Comment

ID: 39669382
Your are right.  I got to working on another thing and got them confused.  I will close this out and get the answer marked.

I believe I know how to get the next total that I need using 2x SQL queries with the do until eof but I can't get it figured out with a DSUM.
0

## Featured Post

Question has a verified solution.

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

### Suggested Solutions

Title # Comments Views Activity
Documents and settings folder 30 76
Server 2012 management. 5 23
VBSScript Error IP Array 6 21
VBA to copy the database back end to a new database file. 3 34
Overview: This article:       (a) explains one principle method to cross-reference invoice items in Quickbooks®       (b) explores the reasons one might need to cross-reference invoice items       (c) provides a sample process for creating a M…
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 …
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
In Microsoft Access, learn how to “cascade” or have the displayed data of one combo control depend upon what’s entered in another. Base the dependent combo on a query for its row source: Add a reference to the first combo on the form as criteria i…

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

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