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Access Select query producing duplicate records

Posted on 2013-05-29
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Last Modified: 2013-10-15
running access 2k10, query which is producing multiple duplicate records in the result. Not on all records, just some. I've checked all related tables and there are no duplicates. I've added "Distinct" to the query but no change.

I've attached an rtf doc with the access query and the sql view. Any help greatly appreciated.
Document.rtf
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Question by:jsgould
8 Comments
 
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by:urthrilled
urthrilled earned 501 total points
ID: 39205213
Try linking the Job table to the Tasks table by Job_No, instead of from JobRS to Tasks.
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Author Comment

by:jsgould
ID: 39205583
No difference, linking as . I believe it has something to do with Tasks. If I remove them from the query completely, I don't get the dups
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by:Patrick Matthews
Patrick Matthews earned 501 total points
ID: 39206484
I've added "Distinct" to the query but no change.

Please indicate what you mean by "producing multiple duplicate records in the result", because DISTINCT will never give you duplicates.  It is impossible for this to happen.
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Author Comment

by:jsgould
ID: 39206501
if u look at the sql in the attachment above, I inserted distinct after SELECT in the vba sql statement.

For a few entries, not all, i will get 2 to 4 exact duplicate records for a given acronym.
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Expert Comment

by:Patrick Matthews
ID: 39206518
jsgould, I am sorry to be a pain here, but that is simply not possible.  There has to be some difference in the records.
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Assisted Solution

by:PortletPaul
PortletPaul earned 498 total points
ID: 39206855
it is my belief that some believe 'distinct' holds a magic quality and that it will intuitively know that the user wants only "one of something" and the other parts of a row "will just happen" (i.e. the magic occurs here).

select distinct -- is not magic
all, columns, will, be, evaluated, and, this, row, is, different, to, the, next, one, by, any, change
from real_world

the message is: "select distinct" works across everything in the row, the whole shooting match, the full enchilada, etc. Just the tiniest difference in any value will make a row "distinctive" from all other rows.

"multiple duplicate records" means you want something that select distinct cannot provide.

please provide your query, some results of it, and an explanation of what you consider is being duplicated. The solution almost certainly will not be "select distinct" by the way.

apologies in advance for the flippancy above - just trying to make a point through some humor
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Accepted Solution

by:
jsgould earned 0 total points
ID: 39208974
viola! discovered that task file has duplicate records. Thanks for all ur assistance
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Author Closing Comment

by:jsgould
ID: 39573141
I solved it by determining it to be a non-problem
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