I'm running the following query, but it is taking too long. Is there a way to make it faster or change the way the query is written?
Please help.
SELECT *
FROM ProductGroupLocUpdate WITH (nolock)
WHERE CmStatusFlag > 2
AND EngineID IN ( 0, 1 )
AND NOT EXISTS (SELECT DISTINCT APGV.LocationID
FROM CM_ST_ActiveProductGroupsView AS APGV WITH(nolock)
WHERE APGV.LocationID = ProductGroupLocUpdate.Locationid);
Try rewriting the query with a join
SELECT PGLU.* from ProductGroupLocUpdate PGLU WITH (NOLOCK)
LEFT JOIN CM_ST_ActiveProductGroupsView APGV WITH (NOLOCK)
ON PGLU.LocationId = APGV.LocationID
WHERE APGV.LocationID IS NULL AND CmStatusFlag>2 AND EngineID IN (0,1)
Depending on how much data is in your table, check add indexes to LocationId (in both tables), CmStatusFlag and EngineID
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