How to use many conditions in query

Question

Hi all,
i have a situation,must prepare a report to find availability of it devices.they are given the specific ip of devices.
my query
SELECT 
 Resultdate, [SERVICE]  ,[SERVICE TYPE] ,[IP]
, DailyAvailability
  FROM [Orion].[dbo].[DepartmentNodesNew] t1
left join (   select round(1-(sum([DownTimeMin])/(1440*count(*))),4)*100  as DailyAvailability,
  count(*) as Node,   c2.ResultDate  ,[Departament]  ,[IPAdress]
   from  [Orion].[dbo].[OrionEventsNodeDownTime] as c2 group by  [Departament] ,[IPAdress] , c2.ResultDate) t2
   on t1.IP=t2.IPAdress 
   where t2.DailyAvailability is not null and t1.SERVICE='SAP CRM' and t2.ResultDate='2014-12-10'
    order by ResultDate
now how can i calculate the daily availability of sap crm which have 2 servers and they are in cluster,when one is down service is ok.when both of them are down service is off. how can i calculate by writing conditions.
 case when  ([SERVICE]='SAP CRM' AND [SERVICE TYPE]= 'DB Server' and [DownTimeMin] =0) then DBAvailability 100
  else  then DBAvailability select round(1-(sum([DownTimeMin])/(1440*count(*))),4)*100 ???

Answer 1

SELECT Resultdate
,[SERVICE]
,[SERVICE TYPE]
,[IP]
,DailyAvailability
INTO #TempTable
FROM [Orion].[dbo].[DepartmentNodesNew] t1
LEFT JOIN (
SELECT round(1 - (sum([DownTimeMin]) / (1440 * count(*))), 4) * 100 AS DailyAvailability
,count(*) AS Node
,c2.ResultDate
,[Departament]
,[IPAdress]
FROM [Orion].[dbo].[OrionEventsNodeDownTime] AS c2
GROUP BY [Departament]
,[IPAdress]
,c2.ResultDate
) t2 ON t1.IP = t2.IPAdress
WHERE t2.DailyAvailability IS NOT NULL
AND t1.SERVICE = 'SAP CRM'
AND t2.ResultDate = '2014-12-10'
ORDER BY ResultDate
SELECT Resultdate
,[SERVICE]
,[SERVICE TYPE]
,[IP]
,DailyAvailability
,CASE
WHEN (
[SERVICE] = 'SAP CRM'
AND [SERVICE TYPE] = 'DB Server'
AND [DownTimeMin] = 0
THEN 100
ELSE round(1 - (sum([DownTimeMin]) / (1440 * count(*))), 4) * 100
END AS 'DBAvailability'
FROM #TempTable
-Vaibhav Chaudhari