Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Access 2007 null values in query appear as #Deleted#

Posted on 2011-03-06
13
Medium Priority
?
657 Views
Last Modified: 2013-11-29
In an Access 2007 application that links SQL Server 2000 tables through ODBC I have created the following query:

SELECT OrderItems.ItemQuantity, OrderItems.ItemID, ItemComponents.ComponentQty, ItemComponents.ComponentID
FROM ((Orders INNER JOIN OrderItems ON Orders.OrderID = OrderItems.OrderID) INNER JOIN BatchControl ON (Orders.ShipDate = BatchControl.ProcDate) AND (Orders.DateBatchID = BatchControl.ProcBatchID)) LEFT JOIN ItemComponents ON OrderItems.ItemID = ItemComponents.ItemID;

Some OrderItems do not have components, and one would expect that in rows where that is the case that the values for ComponentID and ComponentQty would be null.  However, they show as #Deleted#.  The foreign key ItemComponents.ItemID is indexed, but not unique.

As a check I created the following simple query to see just Items and their components, and it displayed null values as expected.

SELECT ItemMaster.ItemID, ItemComponents.ComponentQty, ItemComponents.ComponentID
FROM ItemMaster LEFT JOIN ItemComponents ON ItemMaster.ItemID = ItemComponents.ItemID;

It should be mentioned that I'm using Windows 7.  I don't remember ever having this type of problem with XP or Vista, but I also don't know that I ever attempted to do this exact sort of thing.  It seems like I must have at one time or another, but I can't be sure.  

Any help would be appreciated.
0
Comment
Question by:Smart_Systems
  • 6
  • 5
13 Comments
 
LVL 15

Expert Comment

by:derekkromm
ID: 35051574
21.1.7.3.4: Access reports records as #DELETED# when inserting or updating records in linked tables.

If the inserted or updated records are shown as #DELETED# in the access, then:

If you are using Access 2000, you should get and install the newest (version 2.6 or higher) Microsoft MDAC (Microsoft Data Access Components) from http://support.microsoft.com/kb/110093. This fixes a bug in Access that when you export data to MySQL, the table and column names aren't specified.

You should also get and apply the Microsoft Jet 4.0 Service Pack 5 (SP5) which can be found at http://support.microsoft.com/default.aspx?scid=kb;EN-US;q239114. This fixes some cases where columns are marked as #DELETED# in Access.

For all versions of Access, you should enable the Connector/ODBC Return matching rows option. For Access 2.0, you should additionally enable the Simulate ODBC 1.0 option.

You should have a timestamp in all tables that you want to be able to update.

You should have a primary key in the table. If not, new or updated rows may show up as #DELETED#.

Use only DOUBLE float fields. Access fails when comparing with single-precision floats. The symptom usually is that new or updated rows may show up as #DELETED# or that you cannot find or update rows.

If you are using Connector/ODBC to link to a table that has a BIGINT column, the results are displayed as #DELETED. The work around solution is:

Have one more dummy column with TIMESTAMP as the data type.

Select the Change BIGINT columns to INT option in the connection dialog in ODBC DSN Administrator.

Delete the table link from Access and re-create it.

Old records still display as #DELETED#, but newly added/updated records are displayed properly.
0
 

Author Comment

by:Smart_Systems
ID: 35053369
derekkromm,

Thank you for your answer, but none of the above apply.

It is a select query (i.e. a read operation).
I'm using Access 2007.
There are no bigint or float fields.
Alll tables involved have primary keys.
0
 
LVL 74

Expert Comment

by:Jeffrey Coachman
ID: 35057083
The #Deleted# (most of the time) means that the underlying dataset need to be refreshed.

First simply try refreshing the dataset.
Press Shift+F9

See this MS link as well:
http://support.microsoft.com/kb/128809
0
Nothing ever in the clear!

This technical paper will help you implement VMware’s VM encryption as well as implement Veeam encryption which together will achieve the nothing ever in the clear goal. If a bad guy steals VMs, backups or traffic they get nothing.

 

Author Comment

by:Smart_Systems
ID: 35057375
boag2000,

Thanks for the response, but that's not it either.  The data involved is all static.  The issue appears to be with the combination of joins, but I know I've done such things before without this problem.  The only thing that is different now is Windows 7, but I can't imagine what that has to do with it.
0
 
LVL 74

Expert Comment

by:Jeffrey Coachman
ID: 35059491
Is this the case for all computers on Win7?
Is the Database "Split"?

All the Updates installed for Windows and Office?
0
 

Author Comment

by:Smart_Systems
ID: 35060105
The only computer running on Win 7 is mine.  I did get a chance to run the query on a couple of XP computers and got the same result (i.e. #Deleted# where nulls should appear).

The application is Access 2007 linking SQL Server 2000 tables using ODBC, so yes, it is split.

Windows and Office are current on updates.

Thanks again for your ideas.
0
 
LVL 74

Assisted Solution

by:Jeffrey Coachman
Jeffrey Coachman earned 1200 total points
ID: 35061151
Then double check the info in the links derekkromm posted.

Also try importing the data into a static table in Access and see if this issue goes away...
0
 

Author Comment

by:Smart_Systems
ID: 35116190
Sorry about the absence.  I was dealing with an urgent situation.

boag2000,
I have pretty much come to the same conclusion - move the data to a working table in Access, or I can change the structure (require that there be at least one component per item) so the need for the left join is eliminated.  As I mentioned in my initial question, that does work.  I will be at the db's site tomorrow and will test both ideas.  I'll report back.

0
 

Accepted Solution

by:
Smart_Systems earned 0 total points
ID: 35143683
boag2000,

I implemented my solution (change the system to require at least one component per item, thereby eliminating the need for a left join in the process of exploding items into their components) and everything works fine.  However, your idea of moving the data to a local Access table and working with it from there also works.  I think you deserve at least some of the points if not all.  What would be the protocol for awarding points in a situation like this?
0
 
LVL 74

Expert Comment

by:Jeffrey Coachman
ID: 35143896
Click the "request Attention" link and explain what you would like to do.

;-)

Jeff
0
 
LVL 74

Expert Comment

by:Jeffrey Coachman
ID: 35178090
OK, glad I could be of some assistance...

Congratulations on your solution as well...
;-)

Jeff
0
 

Author Closing Comment

by:Smart_Systems
ID: 35213347
I accepted my comment as part of the solution because it is the method I actually used.  The Expert (Boag2000) proposed a method that would work, but I didn't use that method.  

I gave the solution(s) a B grade because it was more of a workaround than a direct solution for the original issue.  If there was a direct solution, I feel confident that one of the Experts would have known about it.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

You need to know the location of the Office templates folder, so that when you create new templates, they are saved to that location, and thus are available for selection when creating new documents.  The steps to find the Templates folder path are …
If you need a simple but flexible process for maintaining an audit trail of who created, edited, or deleted data from a table, or multiple tables, and you can do all of your work from within a form, this simple Audit Log will work for you.
This lesson discusses how to use a Mainform + Subforms in Microsoft Access to find and enter data for payments on orders. The sample data comes from a custom shop that builds and sells movable storage structures that are delivered to your property. …
Look below the covers at a subform control , and the form that is inside it. Explore properties and see how easy it is to aggregate, get statistics, and synchronize results for your data. A Microsoft Access subform is used to show relevant calcul…

926 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