Conversão de Query SQL Oracle para Query SQL Server

Bom dia!
Estou com problemas na hora de converter uma query que roda em Oracle, rodar em SQL Server.

Alguém poderia me ajudar?
Segue a Query.

select TO_CHAR(DWH001.DWH001_DATE, 'MM') ORDEM,
TO_CHAR(DWH001.DWH001_DATE, 'MON') MES,
TO_CHAR(DWH001.DWH001_DATE, 'YYYY') ANO,
TRUNC(SUM(DWH001.DWH001_ACTIVE_ADMISSION_TOTAL) / (saidas_geral.qtd_saidas),2) TEMPO_MEDIO

from DWH001_ADT_UNIT_TOTAL DWH001,
(select TO_CHAR(adt021_discharge_date, 'MM/YYYY') PERIODO, count(*) QTD_SAIDAS
from adt021_discharge adt021
inner join adt001_admission adt001
on adt001.adt001_admission_id = adt021.adt001_admission_id
inner join sys002_unit sys002
on sys002.sys002_unit_id = adt001.sys002_unit_id
WHERE adt021.adt021_discharge_date BETWEEN TO_DATE('01-'||'01-2015','DD-MM-YYYY') AND last_day(TO_DATE('01-'||'03-2016','DD-MM-YYYY')) --INSERIR FILTRO
and adt001.adt043_admission_regimen_id <> 6 --EXCETO HOSPITAL DIA (12H)
Group by TO_CHAR(adt021_discharge_date, 'MM/YYYY')) SAIDAS_GERAL,
SYS002_UNIT SYS002
WHERE DWH001.DWH001_DATE BETWEEN TO_DATE('01-'||'01-2015','DD-MM-YYYY') AND last_day(TO_DATE('01-'||'03-2016','DD-MM-YYYY')) --INSERIR FILTRO
and sys002.sys002_unit_id = dwh001.sys002_unit_id
and saidas_geral.PERIODO = TO_CHAR(DWH001.DWH001_DATE, 'MM/YYYY')
group by TO_CHAR(DWH001.DWH001_DATE, 'MM'),
TO_CHAR(DWH001.DWH001_DATE, 'MON'),
TO_CHAR(DWH001.DWH001_DATE, 'YYYY'),
SAIDAS_GERAL.QTD_SAIDAS
ORDER BY TO_CHAR(DWH001.DWH001_DATE, 'YYYY'),
TO_CHAR(DWH001.DWH001_DATE, 'MM')