Solved

running count of unique values in a ms access report

Posted on 2013-11-05
4
2,530 Views
Last Modified: 2013-11-17
I have a table that has a list of numbers that i would like to display a running count of unique value in a ms access report, this report has no grouping levels which makes it a bit challenging.Thanks
Database1.accdb
0
Comment
Question by:Svgmassive
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 10

Expert Comment

by:etech0
ID: 39625129
For a list of unique values:

SELECT DISTINCT fieldName FROM tableName;

For a count of unique values:

SELECT Count(*) AS N
FROM
(SELECT DISTINCT fieldName FROM tableName) AS T;
0
 
LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 39625133
is this what you are looking for

SELECT dbo_itemx.Sequencenumber, Count(dbo_itemx.Sequencenumber) AS CountOfSequencenumber
FROM dbo_itemx
GROUP BY dbo_itemx.Sequencenumber;

or maybe this is what you need

SELECT Q.Sequencenumber,
(select count(*) from
(SELECT dbo_itemx.Sequencenumber
FROM dbo_itemx
GROUP BY dbo_itemx.Sequencenumber
)  as Q1 where Q1.SequenceNumber<=Q.SequenceNumber) AS Expr1
FROM
(SELECT dbo_itemx.Sequencenumber
FROM dbo_itemx
GROUP BY dbo_itemx.Sequencenumber
) as Q;



it will help if you post a desired outcome/output
0
 
LVL 47

Accepted Solution

by:
Dale Fye (Access MVP) earned 500 total points
ID: 39625235
You could use a function, see fnUniqueRowCount() in the attached database.

Add a control to your report, set the ControlSource to:

=fnUniqueRowCount([UniqueFieldName])

Then, change the Hide Duplicates (towards the bottom of the Format tab on the Properties dialog form) property to Yes.

Then, to make sure this works in normal view, report view, and print preview, you will need to call the function from the Report Open and Report Footers Format events, with the following code:

=fnuniquerowcount(Null,True)

This will reset the counter when the report is opened or when the report footer is formatted.  The reason for the latter is that when you view the report in print preview, it runs through the report twice and if you don't reset the counter at the end of the report, the numbers will start a the last number + 1
UniqueRowCount.accdb
0
 

Author Comment

by:Svgmassive
ID: 39628243
fyed that's what i am looking,but a strange this is happening if i hide the control and hide duplicates the count is not correct.i just need it to display a total in the page footer per page
0

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

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

In earlier versions of Windows (XP and before), you could drag a database to the taskbar, where it would appear as a taskbar icon to open that database.  This article shows how to recreate this functionality in Windows 7 through 10.
AutoNumbers should increment automatically, without duplicates.  But sometimes something goes wrong, and the next AutoNumber value is a duplicate.  This article shows how to recover from this problem.
The viewer will learn how to  create a slide that will launch other presentations in Microsoft PowerPoint. In the finished slide, each item launches a new PowerPoint presentation and when each is finished it automatically comes back to this slide: …
Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…

737 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