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SQL Query to find records from one table with no matching records from another table in a date range

Zone: SQL Server 2005

Tags: SQL

I am attempting to design an SQL query (for SQL Server 2005) which will return all the records from a table of customers where there have been no activities logged in the last three months.

I have designed the query below, but it only shows me those customer records where activities have been logged. I need to see the records where no activities have been logged. I'm not sure how I modify the query to basically reverse the output.

As a note, the query needs to join to the requests table, as an activity is related to a request by ID and there is no link between an activity and a customer. Requests are linked to customers by ID.

         
             SELECT Count([Start Time]) as CountActivities, [Organisation Name] FROM tblActivities
RIGHT OUTER JOIN tblRequests on tblActivities.RequestID = tblRequests.ID
RIGHT OUTER JOIN tblCustomers on tblRequests.CustomerID = tblCustomers.ID
WHERE [Start Time] BETWEEN DateAdd(m, -3, GetDate()) AND GetDate() 
GROUP BY [Organisation Name]

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9.6

Question Stats

Zone: Microsoft

Question Asked By: johnny_the_knife

Solution Provided By: Thomasian

Participating Experts: 1

Solution Grade: A

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