SQL - Improve pivot query performance - sql

Question

I am performing a pivot operation in my stored procedure as follows, but its affecting the performance as i am using it for the report.
Is there any way/ substitute to this pivot operation to improve the performance? or can i apply indexes for this?
SELECT colId,colSequence,colDescription,
ISNULL([1],0) AS 'IESO',ISNULL([2],0) AS 'RFRC',ISNULL([3],0) AS 'EAL',ISNULL([4],0) AS 'HNS',ISNULL([5],0) AS 'PTE',ISNULL([6],0) AS 'EOC',ISNULL([7],0) AS 'MU'
FROM
(
SELECT PF.FeatureId,PF.Sequence,PF.[Description],PTB.BenefitId,
FROM PSP.table1 PF
LEFT JOIN PSP.table2 PTB ON PF.FeatureId = PTB.FeatureId
left JOIN PSP.table3 PO ON PO.productID = PF.productId
WHERE PF.ProductId = #ProductId AND PF.IsDeleted = 0
) PS
PIVOT
(
MAX (BenefitId)
FOR BenefitId IN
( [1],[2],[3],[4],[5],[6],[7])
) AS pvt
ORDER BY colSequence

Answer 1

Your query use left JOIN PSP.table3 PO but this table don't show in SELECT field list of subquery.
If this table is unuseful, you can remove it, so you'll gain an operation.
Check the indexes on your query tables, but I suppose you have on FeatureId an index as on productID field

Answer 2

not sure if it's super beneficial, but instead of PIVOT you can use aggregate case expressions to get the values you need. you can use OUTER APPLY so you're not having to group by 3 columns, one being a description column.
SELECT colId = PF.FeatureId,
colSequence = PF.Sequence,
colDescription = PF.[Description],
PTB.*
FROM PSP.table1 PF
OUTER APPLY (
SELECT 'IESO' = COUNT(CASE WHEN BenefitId = 1 THEN 1 END),
'RFRC' = COUNT(CASE WHEN BenefitId = 2 THEN 1 END),
'EAL' = COUNT(CASE WHEN BenefitId = 3 THEN 1 END),
'HNS' = COUNT(CASE WHEN BenefitId = 4 THEN 1 END),
'PTE' = COUNT(CASE WHEN BenefitId = 5 THEN 1 END),
'EOC' = COUNT(CASE WHEN BenefitId = 6 THEN 1 END),
'MU' = COUNT(CASE WHEN BenefitId = 7 THEN 1 END)
FROM PSP.table2 PTB
WHERE PF.FeatureId = PTB.FeatureId
) PTB
WHERE PF.ProductId = #ProductId
AND PF.IsDeleted = 0