Error in Update using CASE

I get an error when executing the following code. Can someone tell me where I am going wrong?
UPDATE IC
	SET IC.InvoiceSiteID = (CASE WHEN IC.SiteID IN(SELECT InvoiceToSite FROM QuoteInvoicing 
								WHERE QuoteID = IC.QuoteID)
								THEN InvoiceToSite
							ELSE MIN(InvoiceToSite) FROM QuoteInvoicing 
								WHERE QuoteID = IC.QuoteID
									AND InvoiceToSite <> IC.SiteID 
							END)
FROM #InvoiceConsolidation IC
INNER JOIN QuoteInvoicing IQ ON IC.QuoteID = IQ.QuoteID

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BrookKAsked:
Who is Participating?
 
Aneesh RetnakaranDatabase AdministratorCommented:
UPDATE IC
      SET IC.InvoiceSiteID = (CASE WHEN IC.SiteID IN(SELECT InvoiceToSite FROM QuoteInvoicing
                                                WHERE QuoteID = IC.QuoteID)
                                                THEN InvoiceToSite
                                          ELSE (SELECT MIN(InvoiceToSite) FROM QuoteInvoicing
                                                WHERE QuoteID = IC.QuoteID
                                                      AND InvoiceToSite <> IC.SiteID  )
                                          END)
FROM #InvoiceConsolidation IC
INNER JOIN QuoteInvoicing IQ ON IC.QuoteID = IQ.QuoteID
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
this should do:
UPDATE IC
      SET IC.InvoiceSiteID = (CASE WHEN IC.SiteID IN(SELECT InvoiceToSite FROM QuoteInvoicing 
                                                WHERE QuoteID = IC.QuoteID)
                                                THEN InvoiceToSite
                                          ELSE SELECT MIN(InvoiceToSite) FROM QuoteInvoicing 
                                                WHERE QuoteID = IC.QuoteID
                                                  AND InvoiceToSite <> IC.SiteID 
                                          END)
FROM #InvoiceConsolidation IC
INNER JOIN QuoteInvoicing IQ ON IC.QuoteID = IQ.QuoteID

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Aneesh RetnakaranDatabase AdministratorCommented:
or like this

UPDATE IC
      SET IC.InvoiceSiteID = (CASE WHEN EXISTS (SELECT null FROM QuoteInvoicing
                                                WHERE QuoteID = IC.QuoteID AND IC.SiteID = InvoiceToSite)
                                                THEN InvoiceToSite
                                          ELSE (SELECT MIN(InvoiceToSite) FROM QuoteInvoicing
                                                WHERE QuoteID = IC.QuoteID
                                                      AND InvoiceToSite <> IC.SiteID  )
                                          END)
FROM #InvoiceConsolidation IC
INNER JOIN QuoteInvoicing IQ ON IC.QuoteID = IQ.QuoteID
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BrookKAuthor Commented:
Thank you All.

There was a syntax error and I have corrected it as per Aneeshattingal's first post but had to use CAST for MIN(InvoiceToSite) to convert to INT.

Thanks all
-B
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Anthony PerkinsCommented:
Great!  Please close the question.
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