Calculating 'time Difference' Between Two Records....

Dec 21, 2005

I have a data set like so:


UTC_TIME Timestamp NodeID Message Flag
Line
Station
11/19/2005 10:45:07 1132397107.91 1 3 5 1028
1034
11/3/2005 21:05:35 1131051935.20 2 3 5 1009
1043
11/25/2005 21:12:16 1132953136.59 3 3 5 1037
1049


I added the UTC_TIME column in as aconversion of the unix timestamp in

the TIMESTAMP column.


Keeping things simple and straightforward, I need to be able to
calculate the difference from one record to the next (ordered by
TIMESTAMP or UTC_TIME) and output the result into another column in the

table.


NODEID is the unique id.


First, what is the function to do so if, say, I only wanted to
calculate the difference between 2 records as just a basic SELECT
statement. That way I can answer quick question based on any one or two

NODEID's.


Second, how would I further that to continually calculate (as stated
above)?


WOuld this be a stored procedure? A trigger? A cursor?


I am learning as I go here. Any help is greatly appreciated.


R.

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Oct 23, 2007

I have the following staement :
   AVG( CASE WHEN EventTypeName=''EventA''  THEN CAST(DateDiff(s,EntryTime,EventDateTime) as float) END ) as Duration1
 but the problem here is that i need to find the difference between two EventTypes EventA and EventB  NOT EntryTime and EventDateTime of EventA
 so how can i re-do the above query to get:
EventA - EventB
Not
EntryTime - EventA
 NOTE: EventDateTiem is the time that the EventA occurred.
 
thanks
robby

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Time Difference Between Two Dates

Apr 10, 2008

advance thanks to all...can anybody helpme soon...........
i am using sql server 2005........i want to find out time difference between two dates in HH,MM,SS format
eg i want the time difference of these two dates
02/Nov/06 9:14:21 AM
19/Apr/07 11:52:31 AM 
now i am using this calculation in my procedure is as follows...but i think this is wrong...if we will seperatly calculate like this wrong i am getting
set @totaltravelHr=datediff(HH,@datediff1,@datediff2)
set @totaltravelMI=datediff(MI,@datediff1,@datediff2)
set @totaltravelSE=datediff(SS,@datediff1,@datediff2)
 
 

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