Question

I have three tables Invoice, Account and Visits

Each has a primary key in common (AccountID). I need to draw data for accounts that have not had a visit in the month of july and had a valid account to allow a visit in that month (drawn from Invoice – scheduletype and Account – startdate)

I have tried using several joins but am not able to get the data out as I need it and am fairly new to SQL. Would anyone be able to help me out with some pointers please?

Answer 1

Guessing with the Visit date,

SELECT  a.AccountID
FROM    Account a
WHERE   NOT EXISTS  (
                    SELECT 1 
                    FROM Invoice i 
                    WHERE i.AccountID = a.AccountID 
                    AND i.ScheduleType = 'hold'
                    AND i.StartDate < '8/1/2012'
                    AND i.EndDate >= '7/1/2012'
                    )
AND     NOT EXISTS  (
                    SELECT 1
                    FROM Visits v
                    WHERE v.AccountID = a.AccountID
                    AND v.SessionDate >= '7/1/2012'
                    AND v.SessionDate < '8/1/2012'                  
                    )
AND     a.StartDate < '8/1/2012'
AND     a.EndDate >= '7/1/2012'
GO