Distinct Count in Access 2007

Posted on 2012-04-01
Medium Priority
Last Modified: 2012-04-01
Hey guys,

Need to count distinct invoice numbers in the below query.  Have tried lots of ways to no effect... can someone please assist.



SELECT [Working-rep+acc].[Sales Rep], Count ([Working-rep+acc].[Invoice Number]) AS  [CountOfInvoice Number]
FROM [Working-rep+acc]
GROUP BY [Working-rep+acc].[Sales Rep];
Question by:rustyroo
LVL 29

Expert Comment

ID: 37792826
You just need to group by the Invoice Number as well.

SELECT [Working-rep+acc].[Sales Rep], [Working-rep+acc].[Invoice Number], Count ([Working-rep+acc].[Invoice Number]) AS  [CountOfInvoice Number]
FROM [Working-rep+acc]
GROUP BY [Working-rep+acc].[Sales Rep], [Working-rep+acc].[Invoice Number];
LVL 12

Expert Comment

ID: 37792830
in access you should use sub-query for your select that contains the distinct select
something like

SELECT t.[Sales Rep], Count (t.[Invoice Number]) AS  [CountOfInvoice Number]
SELECT distinct [Working-rep+acc].[Sales Rep], [Working-rep+acc].[Invoice Number]) AS t
GROUP BY [Working-rep+acc].[Sales Rep];
LVL 41

Accepted Solution

als315 earned 2000 total points
ID: 37792835
If you have multiple entries for [Invoice Number] for each [Sales Rep], and you like to count only unique Invoice numbers, you should at first create query, where you will Group by Invoice Number and Sales Rep. In second query you will be able to count unique Invoice Numbers. Queries could be combined in one.
Result could be:

SELECT Count(Q1.[Invoice Number]) AS [CountOfInvoice Number], Q1.[Sales Rep]
FROM (SELECT [Working-rep+acc].[Invoice Number], [Working-rep+acc].[Sales Rep]
FROM [Working-rep+acc]
GROUP BY [Working-rep+acc].[Invoice Number], [Working-rep+acc].[Sales Rep]) As Q1
GROUP BY Q1.[Sales Rep];

Author Closing Comment

ID: 37793061
worked great thanks

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