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Elapsed time


Elapsed time

Author
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Steve Jones
Steve Jones
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Show a series of start and stop times, listed for a group of people. calculate the elapsed times (or dates) and order them.

create table Runners
( runnerid int
, timemark time
)

insert runners (runnerid, timemark)
values (1, '12:00')
, (2, '12:00')
, (3, '12:00')
, (4, '12:00')
, (1, '12:15')
, (2, '12:17')
, (3, '12:16')
, (4, '12:15')



Follow me on Twitter: @way0utwest
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dwain.c
dwain.c
SSCoach
SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)

Group: General Forum Members
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Will each runner have at most 2 entries?

If only one entry (start time), then what would you like to see for elapsed time?

If more than 2, does the latest time count as the end time?

And what if it's a marathon that starts at 23:00 and runs over to the next day?


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

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


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.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
Steve Jones
Steve Jones
SSC Guru
SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)

Group: Administrators
Points: 151844 Visits: 19455
Feel free to handle this as a couple pieces, perhaps in different ways.

For the first, let's say two times for each runner, could cross days.

If you want to tackle a second, make it more open ended. allow for errors, or assume there are splits and the last time is the end time.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
dwain.c
dwain.c
SSCoach
SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)

Group: General Forum Members
Points: 18581 Visits: 6431
I'll give it a look this weekend.


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

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


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.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
Steve Jones
Steve Jones
SSC Guru
SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)

Group: Administrators
Points: 151844 Visits: 19455
Thanks, and let me know.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
dwain.c
dwain.c
SSCoach
SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)

Group: General Forum Members
Points: 18581 Visits: 6431
I've made a submission.

I hope it's what you were looking for and more importantly I hope I didn't miss some kind of trick part of the question.


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

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


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.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
dwain.c
dwain.c
SSCoach
SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)

Group: General Forum Members
Points: 18581 Visits: 6431
Interesting that this related thread should appear just now:

http://www.sqlservercentral.com/Forums/Topic1492737-3077-1.aspx?Update=1


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

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


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.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
Steve Jones
Steve Jones
SSC Guru
SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)SSC Guru (151K reputation)

Group: Administrators
Points: 151844 Visits: 19455
Thanks, I'll look it over this week.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
dwain.c
dwain.c
SSCoach
SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)SSCoach (18K reputation)

Group: General Forum Members
Points: 18581 Visits: 6431
I see you accepted it now for publication. That's cool!

I noticed that I misspelled "Spackle" as "Spacklet" in the title. I hope you can correct that before publication.

I don't want to mess with it myself now that it's been accepted (don't know what would happen to the status).


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

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


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.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
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