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Old September 20th, 2006, 09:58 AM
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Default Nesting queries???

First time poster, long time searcher...

I have these following tables:

TripsFeatures (linking table)
ListFeatures (linking table)

Trips can include multiple features.
Features can belong to multiple lists.
So, some Features have been visited (during a Trip) and some have not.
I want to sum Features belonging to each List that have been visited.

So far the only way I can do it is to build one query called qryFeaturesVisited:

SELECT tblListFeatures.ListID, tblTripsFeatures.FeatureID
FROM tblListFeatures INNER JOIN tblTripsFeatures ON tblListFeatures.FeatureID = tblTripsFeatures.FeatureID
GROUP BY tblListFeatures.ListID, tblTripsFeatures.FeatureID;
This gives me a recordset that is a subset of Features, including only those that have been visited.
Then I do another query:

SELECT tblLists.ListName, Count(qryFeaturesVisited.FeatureID) AS CountOfFeatureID
FROM qryFeaturesVisited INNER JOIN tblLists ON qryFeaturesVisited.ListID = tblLists.ListID
GROUP BY tblLists.ListName;
This one gives me the result but is cumbersome b/c of using multiple queries. I of course have other considerations in the db so if possible, I'd like to do this in one slick query.

Can anyone help me combine the SQL into one query? I mostly write SQL by doing things in Access design view and then editing SQL. Needless to say, I'm a beginner but understand the importance of designing good queries upfront.

Thanks in advance!

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