return consecutive no show appointments 1

[tipofapin]

Using SQL 2005 and SSRS 2008 R2. I have a list of clients who have had appointments within a date range. So I have columns with Client name, appointment date and time, and Appt Kept (Y/N). I need to return those who have consecutive no show appointments. That is for 2 or more appointments in a row, their 'Appt Kept' is 'N'. Is there a way to do this?

 

[xlbo]

I would be doing this in the SQL query

Effectively do 2 queries of the data with a rownumber partioned by client (i.e. restarts on change of client

assuming a simple table called Appointments with clientName, appt_date, Attended as the columns you can use:

SELECT * FROM Appointments
WHERE Client_Name IN
(
Select Distinct Client_Name
FROM
(SELECT c1.ClientName, c1.appt_date as dt1, c1.attended as Attended1, c2.Appt_Date as dt2, c2.Attended as Attended2
FROM
(SELECT Client_Name, Appt_date, Attended, row_number() over (partition by Client_Name order by Appt_Date as incr
 FROM Appointments
) c1
inner join
(SELECT Client_Name, Appt_date, Attended, row_number() over (partition by Client_Name order by Appt_Date as incr
 FROM Appointments
) c2
on c1.Client_Name = c2.Client_Name and c1.incr = c2.incr -1
) ConsecutiveMisses
where Attendd1 = 'N' and Attended2 = 'N'
)

Rgds, Geoff

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