Current sp works fine but the processing time is at the high end. Is there a possibility to optimize?In the sp there are several "MAX(CASE..." statements with either "Yes" or "No" results. I'm not totally sure how the "max" works and if it is reading all the records. However, since the result is Yes or No I only need to check if there is at least one record (do not need to read thru the whole table). Can anyone tell me if the sp can be optimized? Thank youSELECT dbo.Job.CompanyJobID, dbo.Job.ChangeDate as date, dbo.Job.Name, dbo.Region.CompanyRegionID, dbo.Job.Active, MAX(CASE dbo.SourceType.CompanySourceTypeID WHEN 'MA' THEN 'Yes' ELSE 'No' END) AS Material, MAX(CASE dbo.SourceType.CompanySourceTypeID WHEN 'PR' THEN 'Yes' ELSE'No' END) AS Production, MAX(CASE dbo.SourceType.CompanySourceTypeID WHEN 'SB' THEN 'Yes' ELSE'No' END) AS Sub, MAX(CASE dbo.EquipmentLaborEvent.Hours WHEN 0 THEN 'No' ELSE 'Yes' END) AS Equipment, MAX(CASE dbo.EmployeeLaborEvent.Hours WHEN 0 THEN 'No' ELSE 'Yes' END) AS Labor, MAX(CASE dbo.Diary.DiaryEntry WHEN 0 THEN 'No' ELSE 'Yes' END) AS DiaryFROM dbo.Job INNER JOIN dbo.Event ON dbo.Event.JobGuid = dbo.Job.JobGuid INNER JOIN dbo.ProductionEvent ON dbo.ProductionEvent.EventGuid = dbo.Event.EventGuid LEFT JOIN dbo.Product ON dbo.Product.ProductGuid = dbo.ProductionEvent.ProductGuid LEFT JOIN dbo.Item ON dbo.Item.ItemGuid = dbo.Event.ItemGuid INNER JOIN dbo.Source ON dbo.Source.SourceGuid = dbo.ProductionEvent.SourceGuid INNER JOIN dbo.SourceType ON dbo.SourceType.SourceTypeGuid = dbo.Source.SourceTypeGuid LEFT JOIN dbo.EquipmentLaborEvent ON dbo.EquipmentLaborEvent.EventGuid = dbo.Event.EventGuid LEFT JOIN dbo.EmployeeLaborEvent ON dbo.EmployeeLaborEvent.EventGuid = dbo.Event.EventGuid LEFT JOIN dbo.Batch on dbo.Batch.BatchGuid = dbo.Event.EventGuid LEFT JOIN dbo.Diary ON dbo.Diary.BatchGuid = dbo.Batch.BatchGuid INNER JOIN #AuthorityTable AS at ON at.busunit_from <= dbo.Job.CompanyJobId AND at.busunit_to >= dbo.Job.CompanyJobId LEFT JOIN dbo.Region ON dbo.Region.RegionGuid = dbo.Job.RegionGuidWHERE dbo.SourceType.CompanySourceTypeID IN ('PR', 'MA', 'SB') AND (dbo.Job.CompanyJobID LIKE CAST(@JobNumber AS VARCHAR(10)) + '%' OR @JobNumber = 0 OR @JobNumber IS NULL) AND (dbo.Job.Name LIKE '%' + @Text + '%' OR @Text IS NULL) AND (dbo.Job.ChangeDate >= @DateFrom OR @DateFrom IS NULL) AND (dbo.Job.ChangeDate <= @DateTo OR @DateTo IS NULL)GROUP BY dbo.Job.CompanyJobID, dbo.Job.ChangeDate, dbo.Region.CompanyRegionID, dbo.Job.Name, dbo.Job.ActiveORDER BY dbo.Job.CompanyJobID