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Message Posted: Thu, 01 Nov 2001 @ 21:14:34 GMT

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Why bothering with weird calculations when you can use INTERVALs???

select
  logondate
  ,logontime
  ,logdate
  ,logdate
  ,(
    cast(logdate as timestamp(0))
    + cast(substring(logtime from 1 for 8) as interval hour to second(0)))
   -
   (cast(logondate as timestamp(0))
    + cast(substring(logontime from 1 for 8) as interval hour to second(0))
    ) day(4) to second (0) as SessionDuration
from dbc.logonoff l
where event in ('logoff', 'forced off')
sample 10

so it's just weird CASTs

Dieter

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