Question

Multi-level GROUP BY error on Access Report

Asked by: SeanStrickland

I am trying to generate an access report using a query that uses subquery select statements to get trends (SQL posted below).  When I build and run a report on this query, I get the following error from Access:

Multi-level GROUP BY clause is not allowed in a subquery.

If I take out the 2 items in Sorting and Grouping, my report formatting is completely gone, but the report runs/formats.  How can I get this to work and be able to group?

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Asked On
2008-05-09 at 04:15:04ID23388903
Tags

Microsoft

,

Access

,

97

,

problem with GROUP BY and subqueries in report

Topics

Microsoft Access Database

,

SQL Query Syntax

,

Access Reports

Participating Experts
3
Points
500
Comments
8

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Answers

 

by: SeanStricklandPosted on 2008-05-09 at 04:16:15ID: 21531678

I am Sorting/Grouping by:
dccd_dept ASC
pddt_destination_cd ASC
SnapshotDate ASC

SQL:

SELECT tbl_dest_snapshot_trending.pddt_destination_cd, tbl_dest_snapshot_trending.dccd_destination_dsc, tbl_dest_snapshot_trending.dccd_dept, tbl_dest_snapshot_trending.SnapshotDate, Format([SnapshotDate],"dddd") AS Day, tbl_dest_snapshot_trending.CountOfpddt_policy_nbr AS TotalPolicies, (select top 1 CountOfpddt_policy_nbr  FROM  tbl_dest_snapshot_trending AS A  WHERE A.SnapshotDate < tbl_dest_snapshot_trending.SnapshotDate AND A.pddt_destination_cd = tbl_dest_snapshot_trending.pddt_destination_cd order by SnapshotDate  desc) AS prevTotalPolicies, (TotalPolicies-prevTotalPolicies) AS TotalPoliciesTrend, IIf(IsNull([TotalPoliciesTrend]),"--",IIf([TotalPoliciesTrend]<0,"È","Ç")) AS PolicyArrow, tbl_dest_snapshot_trending.AvgOfDIH, (select top 1 AvgOfDIH  FROM  tbl_dest_snapshot_trending AS A  WHERE A.SnapshotDate < tbl_dest_snapshot_trending.SnapshotDate AND A.pddt_destination_cd = tbl_dest_snapshot_trending.pddt_destination_cd order by SnapshotDate  desc) AS prevDIH, (AvgOfDIH-prevDIH) AS DIHTrend, IIf(IsNull([DIHTrend]),"--",IIf([DIHTrend]<0,"È","Ç")) AS DIHArrow, tbl_dest_snapshot_trending.AvgOfDaysInDest, (select top 1 AvgOfDaysInDest  FROM  tbl_dest_snapshot_trending AS A  WHERE A.SnapshotDate < tbl_dest_snapshot_trending.SnapshotDate AND A.pddt_destination_cd = tbl_dest_snapshot_trending.pddt_destination_cd order by SnapshotDate  desc) AS prevAvgOfDaysInDest, (AvgOfDaysInDest-prevAvgOfDaysInDest) AS DIDTrend, IIf(IsNull([DIDTrend]),"--",IIf([DIDTrend]<0,"È","Ç")) AS DIDArrow
FROM tbl_dest_snapshot_trending
ORDER BY tbl_dest_snapshot_trending.dccd_dept, tbl_dest_snapshot_trending.pddt_destination_cd, tbl_dest_snapshot_trending.SnapshotDate;
                                              
1:
2:
3:

Select allOpen in new window

 

by: slam69Posted on 2008-05-09 at 05:25:31ID: 21532025

Only had a very quick look as on my lunch but cant you seperate out the sub query an dthen call that query from inside this one? should allow you to have the group by in the initial query then

 

by: mark_willsPosted on 2008-05-09 at 07:37:23ID: 21533251

You can join various elements such as

select * from
mytable,
(select this,that,max(something) as "maxs" from somewhere group by somethingelse) t,
(select otherthins,max(somethingelse) as "maxe" from somewhereelse group by somethingelse) e
where mytable.column = t.maxs
and mytable.columnelse = e.maxe


etc etc...

Will "try" to unravel that very long line of your and see if I can re-package...

 

by: SeanStricklandPosted on 2008-05-09 at 13:24:05ID: 21536179

That's actually what I did, Mark.  I have 2-3 of those subquery select statements that pull the last DIH, DID, and "TotalPolicies" so it can calculate trends.

The report feature of access has a problem with this, apparently.  Not the query, but grouping on the query.

 

by: nico5038Posted on 2008-05-09 at 14:06:18ID: 21536408

Access is sometimes acting a bit strange with report queries.
The Order By specified by you won't work as Access uses the Grouping for sorting and this will overrule your query's Order By....

When I can't get a query to run with a report I usually change it into an INSERT query and store the result in a temp table. The report is than base on that table.
Not nice, but will work always :-)
(Will of course require in your code before triggering the report a "DELETE * FROM tblReportTemp" and your query changed into an "INSERT" into tblReportTemp.

Nic;o)

 

by: SeanStricklandPosted on 2008-05-09 at 14:59:07ID: 21536632

Or a Make-Table query would override it.

I'm not against using that if I don't see any other solutions on how to get this to work.  I will have the ability to use this as I am the only person that will be manipulating the data.  I am currently feeding everything into an Excel file and using a lot of VBA to format everything.  

 

by: nico5038Posted on 2008-05-09 at 15:08:07ID: 21536670

The Make-Table query will issue an error as the table will exist the second time you run it. So a DROP TABLE will be needed before executing the Make-Table.
Normally I use a Make-Table query the first time and (with small tables) a DELETE *.
For larger tables you're better off with the DROP/CREATE Table solution.

You might try to use instead of the sub-queries a DMAX() like:

DMAX("CountOfpddt_policy_nbr"," tbl_dest_snapshot_trending","A.SnapshotDate < #" & tbl_dest_snapshot_trending.SnapshotDate & "# AND A.pddt_destination_cd = '" & tbl_dest_snapshot_trending.pddt_destination_cd & "'")

Assuming the pddt_destination_cd field is text.

The DMAX()/DMIN/etc. functions are however slooow.

Nic;o)

Nic;o)

 

by: SeanStricklandPosted on 2008-06-25 at 06:14:42ID: 31456461

Thank you!

20120131-EE-VQP-002

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