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Adding Seconds to Time field


Adding Seconds to Time field

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celayne
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I have a field that contains a time (i.e. 16:40:27) and I have a field of "SecondsAtStatus" (i.e. 734).
I need to add the "SecoundsAtStatus" to the Time field to come up with an End Time. Any help is appreciated.
Lynn Pettis
Lynn Pettis
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celayne (8/29/2012)
I have a field that contains a time (i.e. 16:40:27) and I have a field of "SecondsAtStatus" (i.e. 734).
I need to add the "SecoundsAtStatus" to the Time field to come up with an End Time. Any help is appreciated.


Is this an actual time field or is it defined as a varchar?

Cool
Lynn Pettis

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celayne
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It is a time field
Lowell
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As Lynn was asking, it's a real TIME datatype, you can add values via dateadd.


/*
(No column name) (No column name)
16:40:27.0000000 16:52:41.0000000
*/
declare @time time
SET @time = '16:40:27'
SELECT @time,DATEADD(ss,734,@time)



Lowell

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This:



declare @TimeStr time = '16:40:27',
@SecondsAtStatus int = 734;
select @TimeStr, dateadd(ss, @SecondsAtStatus, @TimeStr);




Cool
Lynn Pettis

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celayne (8/29/2012)
It is a time field


Then you actually have a potentially serious problem. What do you want to do when adding the seconds takes you over 24 hours???

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
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Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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Lynn Pettis
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Jeff Moden (8/30/2012)
celayne (8/29/2012)
It is a time field


Then you actually have a potentially serious problem. What do you want to do when adding the seconds takes you over 24 hours???


Doesn't overflow, just rolls around.




declare @TimeStr time = '16:40:27',
@SecondsAtStatus int = 86399;
select @TimeStr, dateadd(ss, @SecondsAtStatus, @TimeStr)
go

declare @TimeStr time = '16:40:27',
@SecondsAtStatus int = 86400;
select @TimeStr, dateadd(ss, @SecondsAtStatus, @TimeStr)
go

declare @TimeStr time = '16:40:27',
@SecondsAtStatus int = 86401;
select @TimeStr, dateadd(ss, @SecondsAtStatus, @TimeStr)
go




Cool
Lynn Pettis

For better assistance in answering your questions, click here
For tips to get better help with Performance Problems, click here
For Running Totals and its variations, click here or when working with partitioned tables
For more about Tally Tables, click here
For more about Cross Tabs and Pivots, click here and here
Managing Transaction Logs

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Jeff Moden
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Like I said... serious problem.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
dwain.c
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Jeff Moden (8/30/2012)
Like I said... serious problem.


Jeff - I don't get it (no coffee yet this morning).

If it starts at 23:59:00 and ends at 00:01:00 (120 seconds), what is the problem?


My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

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My advice:
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Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Learn to understand recursive CTEs by example.
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My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
Jeff Moden
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dwain.c (8/30/2012)
Jeff Moden (8/30/2012)
Like I said... serious problem.


Jeff - I don't get it (no coffee yet this morning).

If it starts at 23:59:00 and ends at 00:01:00 (120 seconds), what is the problem?


It depends... on whether or not that's the desired effect. If you're trying to aggregate time (for example) then the wrap at 24 hours is a killer on a TIME "field".

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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