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evanburen
Posting Yak Master
155 Posts |
 Posted - 06/16/2014 : 10:09:00
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I'm getting some odd results with trying to find the average of the number of minutes between two date values.
Here is a list of records showing the number of minutes between two values which is correct.
select top 10
DATEDIFF(minute, timeofreview, endtimeofreview) AS CallMins
from calls
But what I want is the average of these ten and this produces the results below.
select top 10
AVG(DATEDIFF(minute, timeofreview, endtimeofreview)) as AVGDiff
from calls
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Edited by - evanburen on 06/16/2014 10:43:46
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SwePeso
Patron Saint of Lost Yaks
Sweden
30114 Posts |
Posted - 06/16/2014 : 10:43:43
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with ctesource as (select top(10) datediff(minute, timeofreview, endtimeofreview) as avgdiff)
select avg(avgdiff) from ctesource
Microsoft SQL Server MVP, MCT, MCSE, MCSA, MCP, MCITP, MCTS, MCDBA |
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evanburen
Posting Yak Master
155 Posts |
Posted - 06/16/2014 : 10:51:37
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Thanks but I'm getting back this
Invalid column name 'timeofreview'
Invalid column name 'endtimeofreview' |
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sz1
Constraint Violating Yak Guru
United Kingdom
392 Posts |
Posted - 06/16/2014 : 11:26:38
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Check your column names?
We are the creators of our own reality! |
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Lamprey
Flowing Fount of Yak Knowledge
4612 Posts |
Posted - 06/16/2014 : 11:35:39
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There is no table name on the select in the CTE.
with ctesource as (select top(10) datediff(minute, timeofreview, endtimeofreview) as avgdiff from calls)
select avg(avgdiff) from ctesource |
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sz1
Constraint Violating Yak Guru
United Kingdom
392 Posts |
Posted - 06/16/2014 : 11:38:51
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Yep missing From
We are the creators of our own reality! |
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evanburen
Posting Yak Master
155 Posts |
Posted - 06/16/2014 : 13:26:25
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| working now. thanks a lot. |
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ScottPletcher
Constraint Violating Yak Guru
USA
341 Posts |
Posted - 06/16/2014 : 13:33:04
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SELECT TOP (10)
CAST(SUM(DATEDIFF(SECOND, timeofreview, endtimeofreview)) / 60.0 / COUNT(*) AS decimal(5, 1)) AS AVGDiff
FROM calls
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Edited by - ScottPletcher on 06/16/2014 13:34:19 |
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Topic |
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AVG With DATEDIFF
