[mso] Re: Access 2002 Doesn't Link Null Data

Thanks for the detailed info, it is helpful.  No, the left to right 
doesn't matter except in my adled brain it just helps me to visually keep 
track of the flow when I'm looking at the query grid, and if I place the 
master on the left, it helps me work out the joins.  Sorry for adding to 
any confusion.  I work with alot of linked tables to other systems, where 
I don't have control over the table structure, relationships, etc., and 
have learned to work out the kinks in the query and the joins make all the 
difference, so it just works out better for me to keep track and was 
sharing what I found to be helpful.  Sometimes I toggle into the SQL view 
to further work things out, but then toggle back into the design view to 
'see' better. 
If you don't get duplicates on the last/first name matches, that should do 
for the unique ID.  I see David's reply with recommended SQL, that looks 
like the right way to go, it should get you on the right track - will keep 
an eye on this thread, thanks for the info, Cathy




Ray Shapp <ras45@xxxxxxxxxxxxx>
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11/16/2007 02:26 AM
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[mso] Re: Access 2002 Doesn't Link Null Data





Hi Cathy,

Thank you for the reply.

<<What is the recordsource for the existing query?  >>

The existing query extracts a subset from a single master table which 
contains 
records for all the people who have been members of our club since data 
was 
computerized about twenty years ago. The existing query merely extracts a 
single record for each currently active member. All fields in the master 
table 
are represented in the Active Members subset.


<<Is there a primary key for an ID in the master table?>>

No. The combination of Last_Name and First_Name fields uniquely identifies 

each member. We also have a field for middle initial, but I don't think it 
has 
ever been needed to resolve duplicates. We have added "Jr" to First_Name 
entry 
for a few individuals.


<<...more info on the master data table structure it would be helpful. >>

A single record containing about 500 bytes in 30 fields of data contains 
all 
the info pertinent to a single individual. We have about a thousand such 
records, but only a little over 200 records pertain to currently active 
members.


<<Are the links in this new query one to one or one to many? >>

The links are one to one. I join Last_Name in Active Members query to Last 

Name in the new query. I similarly join First_Name.


<< I was taught to build my queries from left to right,>>

I'm not sure what significance there is in the left/right placement in my 
case. How does it matter whether the master table is to the left or right 
of 
the Active Members query? In my case I have placed the Active Members 
query to 
the left of the master table. Would my results differ if I reversed the 
order?

Thanks for the help.

Ray Shapp


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