I want to identify how many clients have 2, 3, x appointments within a given time period, where the start date is determined by the first appointment (so it's not a set period such as Jan-June).
I have a table like so:
Record_ID
Client_ID
Appointment_date
Outcome
1
ABC
ddmmyyyy
A
2
ABC
ddmmyyyy
B
3
ABC
ddmmyyyy
C
4
DEF
ddmmyyyy
B
5
GHI
ddmmyyyy
C
6
GHI
ddmmyyyy
B
7
JKL
ddmmyyyy
A
Record_ID has unique values for each row; the other fields may repeat values.
First challenge
For each Record_ID, I want to count the number of other records with the same Client_ID whose Appointment_date is after a defined period of the appointment date of the record in question. For example, for Record 1, how many other records does Client ABC have with an appointment date greater than [appointment_date(R1)] but less than [appointment_date(R1) + 183]. Call this Next6Months
Second challenge
Once I have calculated this for each Record ID, I want to identify the maximum value of Next6Months for each Client_ID. I think I can use aggr function for this - aggr(Max(Next6Months),Client_ID). I'll use that to create a dimension, grouping clients according to how many appointments they had in the space of 6 months.
Lastly, I want to be able to study these patterns for given values of Outcome - how many clients had 5 appointments with the Outcome A in a 6 month period, for example. Outcome is a dimension used in other graphs in my app, so I just need the formulae used to calculate the above to be responsive to filters.
If( Appointment_date <= AddMonths(AsOf_Appointment_date,6), 1, 0) as InNext6Months
RESIDENT
TempData
WHERE
Appointment_date >= AsOf_Appointment_date
;
DROP TABLE TempData;
You can then sum the field InNext6Months to find how many appointments fall in the six month period for each appointment. Dimensions: AsOf_Appointment_date, Client_ID. Expression: sum(InNext6Months)
If you want the maximum you'll have to aggregate the sums per client and appointment to calculate the max:
