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Is the following a valid update query

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Last Modified: 2015-10-03
Hi Experts,
Is the following a valid UPDATE query in SQL Server 2008.


With tblA as
(
SELECT ORS.EXTERNORDERKEY, PDTL.SKU, SUM(PDTL.QTY) AS ITEMQTY
FROM INFORPROD.PRD1.WH1.CASEID CID
INNER JOIN INFORPROD.PRD1.WH1.ORDERS ORS ON CID.REFERENCE1 =  ORS.ORDERKEY
INNER JOIN INFORPROD.PRD1.WH1.PICKDETAIL PDTL ON PDTL.CASEID = CID.CASEID
INNER JOIN INFORPROD.PRD1.WH1.SKU SKU ON SKU.SKU = PDTL.SKU AND SKU.STORERKEY = PDTL.STORERKEY
WHERE ORS.EXTERNORDERKEY = 'WEB229046'
GROUP BY ORS.EXTERNORDERKEY, PDTL.SKU
)
,
tblB as
(
SELECT *
FROM SOP10200_BAK09092015
WHERE SOPNUMBE = 'WEB229046'
)
--SELECT * FROM tblA
UPDATE tblB --SOP10200_BAK09092015
SET QTYFULFI = X.ITEMQTY,
QTYSLCTD = X.ITEMQTY,
FUFILDAT = GETDATE()
From tblA X
WHERE tblB.SOPNUMBE = X.EXTERNORDERKEY
AND tblB.ITEMNMBR = X.SKU
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