Question

Access Query Select Count for a junction table.

Asked by: Newbie20

Hi Experts,

I have a junction table with a field called [Intralink Publication Type].  The main table is linked to the junction table by [EventNum].

I would like to build a query that counts the total # of types for each eventnum (i.e. for event # 255 there are 2 manuals, 3 job aids, 0 FAQs for event #256 there are 0 manuals, 6 job aids, 1 FAQ, etc.)

Attached is a select statement with the associated error message.

Thanks for your help!

Expression1: (SELECT TBL_1_Submission.EventNum, Count(TBL_JunctionAttachments.[Intralink Publication Type]) AS ManualCount FROM TBL_1_Submission INNER JOIN TBL_JunctionAttachments ON TBL_1_Submission.EventNum = TBL_JunctionAttachments.EventNum GROUP BY TBL_1_Submission.EventNum)

                                  
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Asked On
2009-09-09 at 12:31:29ID24719278
Tags

acess 2003

Topic

Microsoft Access Database

Participating Experts
2
Points
250
Comments
3

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Answers

 

by: LimbeckPosted on 2009-09-09 at 12:35:15ID: 25294750

hi, select the field  TBL_1_Submission.EventNum in the first column then use this expression in the second:

Expression1: (SELECT Count(TBL_JunctionAttachments.[Intralink Publication Type]) AS ManualCount FROM TBL_1_Submission INNER JOIN TBL_JunctionAttachments ON TBL_1_Submission.EventNum = TBL_JunctionAttachments.EventNum GROUP BY TBL_1_Submission.EventNum)

 

by: Newbie20Posted on 2009-09-09 at 13:09:11ID: 25295086

Hi,

I receive a message that states 'At most one record can be returned by this subquery'. (Error 3354)

 

by: sbsdevelopPosted on 2009-09-09 at 14:14:39ID: 25295632

Try putting

  1. EventNum in the first column, select 'group by' in the total row 
  2. pubType: TBL_JunctionAttachments.[Intralink Publication Type] in the next column, select 'group by' in the total row 
  3. cntof: TBL_JunctionAttachments.[Intralink Publication Type] in the next column, select 'count' in the total row 

If you need the results formatted nicer and not in separate columns, save this query, then build another query based on this one, and combine the columns as you like - e.g. put the following in the 'Field' row  

EventTypes: "Event # " + EventNum + " has " + cntof + " " + pubType

This is still vertical though:
Event # 255 has 2 manuals
Event # 255 has 3 job aids
Event # 255 has 0 FAQs

If you need it horizontally like you listed above, or if I have totally missed the mark here let me know..

Galen

20120131-EE-VQP-002

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