Performance issues when running stored procedure
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29-10-2019 - |
Frage
I am running a store procedure which is taking a lot of time , due to which i have to increase the timeout to nearly 3 minutes, can any one provide assistance on how i can decrease the time for the store procedure to execute , it works fine on 100-500 codes but when the code exceeds to somehow 20000 , it slows up and takes upto 3-4 minutes , below is the sp, can anyone help me optimizing it.
@GUID uniqueidentifier
-- Insert statements for procedure here
SELECT
COUNT(Code.allocatedVendorID) AS Amt,
MIN(Code.dateAllocated) AS dateAllocated,
derivedtbl_1.startID, derivedtbl_2.endID,
tbVendor.name,
Code.unitCost, Code.isFree, Code.isAcademic,
Code.isVoided, Code.GUID, Code.expiryDate
FROM
Code
INNER JOIN
(SELECT MIN(CodeID) AS startID, GUID
FROM Code AS tbAccessCode_1
GROUP BY GUID) AS derivedtbl_1
ON Code.GUID = derivedtbl_1.GUID
INNER JOIN
(SELECT MAX(accessCodeID) AS endID, GUID
FROM Code AS tbAccessCode_1
GROUP BY GUID) AS derivedtbl_2
ON Code.GUID = derivedtbl_2.GUID
INNER JOIN tbVendor
ON Code.allocatedVendorID = tbVendor.vendorID
WHERE (Code.GUID = @GUID) AND (Code.allocatedVendorID > 0)
GROUP BY
derivedtbl_1.startID, derivedtbl_2.endID,
tbVendor.name,
Code.unitCost, Code.isFree, Code.isAcademic,
Code.isVoided, Code.GUID, Code.expiryDate
ORDER BY dateAllocated DESC
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