Identify sources of billed cost

Postgres SQL, as run

select case when publisher_name is not null and publisher_name is distinct from invoice_issuer_name then publisher_name else provider_name end as service_provider_name,
       case when provider_name = 'AWS' and service_name = 'Red Hat OpenShift Service on AWS' then provider_name
            when (case when publisher_name is not null and publisher_name is distinct from invoice_issuer_name then publisher_name else provider_name end) <> provider_name then null::text
            else provider_name end as host_provider_name,
       invoice_issuer_name as invoice_issuer_name,
       sum(billed_cost) as total_billed_cost
from focus.cost_and_usage
where charge_period_start >= $1::timestamptz
  and charge_period_end < $2::timestamptz
group by 1, 2, 3
order by total_billed_cost desc nulls last, service_provider_name, host_provider_name nulls last, invoice_issuer_name nulls last
limit 500

Parameters: $1 = period_start, $2 = period_end

Original FOCUS SQL

SELECT 
    ServiceProviderName,
    HostProviderName,
    InvoiceIssuerName,
    InvoiceId,
    SUM(BilledCost) AS TotalBilledCost
FROM focus_data_table
WHERE ChargePeriodStart >= ? and ChargePeriodEnd  < ?
GROUP BY
    ServiceProviderName,
    HostProviderName,
    InvoiceIssuerName,
    InvoiceId