finding max time in calculations

I need to find the max time difference between two times.
I am getting an aggregate error.
SELECT CLE_IDX_CHAN, COUNT(CLE_IDX_OFFHOOK) ''Call Count'', SUM(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)) ''Seconds'',
            CONVERT(VARCHAR(12),DATEADD(ss, AVG(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)), CAST(0 AS DATETIME)),8) ''Avg Length'',
            CONVERT(VARCHAR(12),DATEADD(ss, SUM(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)), CAST(0 AS DATETIME)),8) ''Total Length'',
            MAX(CONVERT(VARCHAR(12),DATEADD(ss, SUM(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)), CAST(0 AS DATETIME)),8) )
            FROM CL_EVENTS_IDX WITH (NOLOCK)
                  INNER JOIN CL_EVENTS A WITH (NOLOCK) ON CLE_IDX_KEY = CLE_ID
                  INNER JOIN UTILITY_INFO WITH (NOLOCK) ON CLE_IDX_UCODE = UTILITY_KEY
                  INNER JOIN CL_EVENTS B WITH (NOLOCK) ON A.CLE_ID = B.CLE_ID AND A.CLE_CALLID = B.CLE_CALLID
                  INNER JOIN CL_APPID_XREF WITH (NOLOCK) on A.CLE_EVID = CLX_APPID
            WHERE A.CLE_TYPE = 508 AND B.CLE_TYPE = 536 and a.CLE_EVID = b.CLE_EVID
                  AND (A.CLE_EVID = 1 OR  A.CLE_EVID = 13)
            Group BY CLE_IDX_CHAN

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portlightAsked:
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David ToddConnect With a Mentor Senior DBACommented:
Hi ,

Try this:
select
	cs.CLE_IDX_CHAN
	, cs.callcount as 'Call Count'
	, cs.seconds as seconds
	, convert( varchar( 12 ), dateadd( ss, cs.AvgLength, 0 ), 8 ) as 'Average Length'
	, convert( varchar( 12 ), dateadd( ss, cs.seconds, 0 ), 8 ) as 'Total Length'
	, convert( varchar( 12 ), dateadd( ss, cs.MaxLength, 0 ), 8 ) as 'Max Length'
from (
	SELECT 
		CLE_IDX_CHAN
		, COUNT(CLE_IDX_OFFHOOK) 'CallCount'
		, SUM(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)) 'Seconds'
		, AVG(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)) 'AvgLength'
		, max( datefidd( ss, cle_idx_offhook, cle_idx_onhook )) 'MaxLength'
	FROM CL_EVENTS_IDX WITH (NOLOCK)
	INNER JOIN CL_EVENTS A WITH (NOLOCK) 
		ON CLE_IDX_KEY = CLE_ID
	INNER JOIN UTILITY_INFO WITH (NOLOCK) 
		ON CLE_IDX_UCODE = UTILITY_KEY
	INNER JOIN CL_EVENTS B WITH (NOLOCK) 
		ON A.CLE_ID = B.CLE_ID 
		AND A.CLE_CALLID = B.CLE_CALLID
		and a.CLE_EVID = b.CLE_EVID
	INNER JOIN CL_APPID_XREF WITH (NOLOCK) 
		on A.CLE_EVID = CLX_APPID
	WHERE 
		A.CLE_TYPE = 508 
		AND B.CLE_TYPE = 536 
		AND (A.CLE_EVID = 1 OR  A.CLE_EVID = 13)
	Group BY 
		CLE_IDX_CHAN 
	) cs
;

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What I've done:
Moved a line from the where clause to the join of cl_events
Moved the converts to varchar etc to an outer query
Left an inner query with the group by

HTH
  David

PS If you'd like it tested, please provide test data
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HugoHiaslCommented:
The two lines beginning with CONVERT are not valid aggregations for a group by statement:

CONVERT(VARCHAR(12),DATEADD(ss, AVG(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)), CAST(0 AS DATETIME)),8) ''Avg Length'',
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portlightAuthor Commented:
Those are not giving me an issue. It is when I add the

 MAX(CONVERT(VARCHAR(12),DATEADD(ss, SUM(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)), CAST(0 AS DATETIME)),8) )

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Line that I begin to get the problem.
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Eugene ZCommented:
<I am getting an aggregate error.>
please post the error
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Scott PletcherSenior DBACommented:
>> Line that I begin to get the problem.
MAX(CONVERT(VARCHAR(12),DATEADD(ss, SUM(DATEDIFF(ss, CLE_IDX_OFFHOOK, CLE_IDX_ONHOOK)), CAST(0 AS DATETIME)),8) ) <<

You can't do a MAX() of a SUM() in SQL Server; you can't embed any of the aggregate functions within each other.
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