इस हिस्से को बदलें
not exists
( SELECT 1
FROM OSUSR_1SV_QAD_PO_DATA B
WHERE
A.TENANT_ID = B.TENANT_ID
--and A.CUSTOMER_PART_NUMBER = A.CUSTOMER_PART_NUMBER --you are Comparing same value here
and A.CUSTOMER_PART_NUMBER = B.CUSTOMER_PART_NUMBER
and A.SHIPPING_ID = B.SHIPPING_ID
and CAST(A.EFFECTIVE_DATE AS DATE) = CAST(B.EFFECTIVE_DATE AS DATE) )
