You're not doing a count distinct, so if your opd_patient_queue_log can have
the same patient_id more than once, that'd be why you get a difference.

-Darius

On Fri, Aug 19, 2011 at 5:37 AM, Bob Jolliffe <[email protected]> wrote:

> I am trying to compose an indicator which makes use of a join with a
> custom table.
>
> Does anyone have an idea why executing the query directly as:
> mysql -u ... -e 'Select count(patient.patient_id) from patient inner
> join opd_patient_queue_log on
> patient.patient_id=opd_patient_queue_log.patient_id'
>
> results in 16593,
>
> but when I create a sql cohort query as above (without the count), I
> get a result of 13592.
>
> How does openmrs count the size of the resultset?  It seems its not a
> simple count ...
>
> Regards
> Bob
>
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