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Complax Case and Select question

In the following select statement I am now passing in a paramater @vType

In the two Case statements when @vType = 'P' I want to use what I have below....referencing ContactV

When @vType <> 'N' I want the CASE statements to use ContactVN

Select 			vw.Pending,
			(	
				CASE WHEN ISNULL(ContactV.id, 0)= 0 AND ISNULL(vw.[Contact ID],0) > 0 THEN 'Add'
				WHEN ISNULL(ContactV.id, 0)> 0 AND ISNULL(vw.[Contact ID],0) > 0 
						AND NOT Exists (Select 1 from dbo.ClientVisitTrackingContacts WHERE vw.[Contact ID] = ContactV.[Contact ID] AND visitID = @VisitID ) THEN 'Add'
				WHEN ISNULL(vw.[Contact ID],0) = 0 THEN ''
				ELSE 'Remove' END
			) AS AddRemove,
			(
				CASE WHEN ISNULL(ContactV.id, 0) = 0 
				THEN 0 
				ELSE 1 END
			) AS ContactVisitSort,
			ContactV.VisitID vid,
			@VisitID id 
	FROM	dbo.vw_MarketingVisitationContacts AS vw 
	LEFT OUTER JOIN
			 dbo.ClientVisitTrackingContacts AS ContactV ON (vw.[Client ID] = ContactV.[Client ID] AND vw.[Contact ID] = ContactV.[Contact ID])
	LEFT OUTER JOIN
			dbo.ClientVisitTrackingNearBy ContactVN ON (vw.[Client ID] = COntactVN.nearbyClientID AND VW.[Contact ID] = ContactVN.nearbyContactID)
	WHERE		(LEN(vw.fullName) > 0) OR (vw.ur = 1)

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Jared_S

You could do this with nested cases, but an IF statement would make it much easier to read.

Either way, you're going to need to modify your criteria since

@vType = 'P'
and
@vType <> 'N'

are not mutually exclusive.

I would use:

IF @vType = 'P'
query1

IF @vType not in ('N','P')
query2

Larry Brister

ASKER

Jared_S
I have it working with nested case statements.

How would I do the "IF" in my select and where?

ASKER CERTIFIED SOLUTION

Jared_S

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SOLUTION

Scott Pletcher

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Larry Brister

ASKER

Thanks guys...
Nod to Jared for being first with a solution

Scott Pletcher

So speed not quality. I got it, will remember that next time and avoid wasting my time posting if you already have any kind of answer to your q.

Larry Brister

ASKER

Scott,
I in no way meant to offend you.
I've used your answers for years and they are always of the highest quality.

This one time I gave a nod on a complex question to another person because quite frankly, running a shop alone I had to move on.

Again...sorry if I offended. If I get the time one evening I already have a reminder to further investigate your answer.