How to select Patients with >5 Appts and get the very 1st Appt date in same Script

[feltonam]

Hi all

I have written a report to identify referrals with more than 5 appointments, and have been asked to add in the first appointment date. My TSQL script uses ROW_NUMBER() over (partition by a.Uniqueref order by care_contact_dttm) row where Row>5 to select the patients, this works fine.

I know the first appointment date should be as above where Row=1 (or is there another way) , but I but do not know how to get in the same script.

Any ideas welcome. I am using SQL Server 2008 R2.

 

[johnherman]

Try thinking about it this way. You want the first appointment date for each referral where there are more than 5 appointments. So, the subquery is the behind the WHERE clause.

Something like SELECT TOP 1 T1.whatever columns FROM table T1 WHERE T1.referral ID = (SELECT T2.referral ID from table T2 HAVING COUNT (T2.appointment date) > 5 GROUP BY T2.referral ID, T2.appointment date) ORDER BY T1.appointment date

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