Select statement in sql query

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Hey guys, im just wondering can someone help me with a bit of sql, I want to check if a column date is the current month and if so preform certain calculations if it is. My Sql

SQL

SELECT  dg.DestinationGroupName AS Destination, c.CarrierShortName AS Carrier,
       SUBSTRING(CONVERT(VARCHAR(11), ba.CDRDate, 106), 4, LEN(CONVERT(VARCHAR(11),ba.CDRDate, 106))) AS Month,
   --IF DatePart(ba.CDRDate) = DatePart(getdate())
   --BEGIN
       SUM(ba.TotalDuration) / 60 AS DurationInMinutes,
       SUM(ba.TotalCost) AS TotalRevenue, SUM(av.AvgCost * ba.TotalDuration)
       AS TotalCost, SUM(ba.TotalCost) - SUM(av.AvgCost * ba.TotalDuration) AS Margin
   --ELSE
   --  SUM(ba.TotalDuration) / 60 * 31 AS DurationInMinutes,
   --  SUM(ba.TotalCost) / 31 AS TotalRevenue, SUM(av.AvgCost * ba.TotalDuration) / 31
   --  AS TotalCost, SUM(ba.TotalCost) - SUM(av.AvgCost * ba.TotalDuration) AS Margin
   --END
   FROM

The commented out code is what I am trying to acheive in my query.
Thanks in advance guys.

Posted 18-Dec-12 1:16am

frostcox

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__TR__ · Accepted Answer · 2012-12-18T01:46:00

Try using CASE[^] statement.
here is a sample

SQL

SELECT  dg.DestinationGroupName AS Destination, c.CarrierShortName AS Carrier,
        SUBSTRING(CONVERT(VARCHAR(11), ba.CDRDate, 106), 4, LEN(CONVERT(VARCHAR(11),ba.CDRDate, 106))) AS Month,

     CASE WHEN DatePart(ba.CDRDate) = DatePart(getdate()) THEN SUM(ba.TotalDuration) / 60
          ELSE SUM(ba.TotalDuration) / 60 * 31 END AS DurationInMinutes,

     CASE WHEN DatePart(ba.CDRDate) = DatePart(getdate()) THEN SUM(ba.TotalCost)
          ELSE SUM(ba.TotalCost) / 31 END AS TotalRevenue,

     CASE WHEN DatePart(ba.CDRDate) = DatePart(getdate()) THEN SUM(av.AvgCost * ba.TotalDuration)
          ELSE SUM(av.AvgCost * ba.TotalDuration) / 31  END AS TotalCost,

     SUM(ba.TotalCost) - SUM(av.AvgCost * ba.TotalDuration) AS Margin
    FROM --....

Since you are using aggregate functions you will also need to use GROUP BY (Transact-SQL)[^]