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 how to avoid inner query to compare count with a
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Constraint Violating Yak Guru

353 Posts

Posted - 05/15/2014 :  06:23:43  Show Profile  Reply with Quote
how to avoid inner query to compare count of a inner query record with a column of main query. want's to do it via some form of joining

FROM [dbo].[coordinator_event] ce
where IsActive = 1
and Dateadd(day, 3, convert(DATE, Getdate())) = CONVERT(DATE, RegistrationClosingDate)
and (select Count(*)
from event_attendee_registration ear
where ce.CoordinatorId = ear.CoordinatorId
and ear.EventId = ce.EventId) < ce.NumberOfParticipantAllowed

Kamran Shahid
Principle Engineer Development

In (Som, Ni, Yak)

17689 Posts

Posted - 05/15/2014 :  07:54:26  Show Profile  Reply with Quote
SELECT 	ce.[Id]
FROM 	[dbo].[coordinator_event] ce
		SELECT	CoordinatorId, EventId, cnt = COUNT(*)
		FROM	event_attendee_registration
		GROUP BY CoordinatorId, EventId
	) ear	ON	ce.CoordinatorId	= ear.CoordinatorId
		AND	ce.EventId		= ear.EventId
WHERE	ear.cnt	<= ce.NumberOfParticipantAllowed

Time is always against us

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