trying to count number of distinct minutes of record inserted by hour. If minutes are in sequential order then they should count as 1.

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trying to count number of distinct minutes of record inserted by hour. If minutes are in sequential order then they should count as 1.

BaldingLoopMan

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Points: 6378
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December 8, 2010 at 8:45 am

#244065

/* Problem: We have a service that runs n times an hour. i need to know how many times it runs.

One of the things it does is insert records into a table. In this instance that table

is #delivered. So i was going to count the number of minutes in the hour in the table. This

should give me the number of runtimes of the service. This works unless in a given runtime

the service is inserting so many records that the records inserted span more than 1 minute.

In this instance my process thinks it ran twice however it actually only ran once.

Does anyone know how to devise a way to count it as one if records span consecutive minutes?

I have under the insert the expected results.*/

create table #delivered

(

id int identity(1,1)

, offerId int

, dateAdded datetime

)

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:02')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:12')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:18')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:18')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:24')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:24')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:24')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:30')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:30')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:30')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:38')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:38')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:44')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:44')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:45')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:45')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:45')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:49')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:49')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:02')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:03')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:03')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:12')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:12')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:21')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:21')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:36')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:36')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:36')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:41')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:41')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (576,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:02')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:02')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:03')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:07')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:08')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:12')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:17')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:18')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:18')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:23')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:24')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:24')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:24')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:25')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:26')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:28')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:30')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:30')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:30')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:31')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:37')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:38')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:38')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:44')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:44')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:45')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:45')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:45')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:49')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:49')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 12:54')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:02')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:03')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:03')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:12')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:12')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:13')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:21')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:21')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:22')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:28')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:29')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:35')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:36')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:36')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:36')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:41')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:41')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

insert into #delivered (offerId, dateAdded) values (499,'12/7/10 13:42')

select *

from #delivered

/* should return. The hour and the number of runtimes. I know this may be confusing

so please feel free to ask for more specifics

hour | runtimes

12 10

13 6

*/

Viewing 8 posts - 1 through 7 (of 7 total)

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Cadavre SSC-Forever Points: 41690 More actions · Answer 1

You'll never get an accurate result from that table.

You could count all of the records that were during consecutive minutes, but what if it ran twice over 2 minutes?

E.G.

Run 1 Starts 15:55:55

Ends 15:58:02

Run 2 Starts 15:59:00

Ends 16:05:00

If you count consecutive minutes, you only get 1 run from that.

Forever trying to learn
My blog - http://www.cadavre.co.uk/
For better, quicker answers on T-SQL questions, click on the following...http://www.sqlservercentral.com/articles/Best+Practices/61537/
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BaldingLoopMan SSCertifiable Points: 6378 More actions · Answer 2

Sorry guys. i need the offerid, the hour, and number of runtimes. Also it will never run twice for a given offer in separate consecutive minutes

/* should return. The offerid, hour and the number of runtimes. I know this may be confusing

so please feel free to ask for more specifics

offerid | hour | runtimes

576 | 12 | 10

576 | 13 | 6

499 | 12 | 10

499 | 13 | 6

*/

BaldingLoopMan SSCertifiable Points: 6378 More actions · Answer 3

BaldingLoopMan

SSCertifiable

Points: 6378

December 8, 2010 at 9:05 am

#1260156

--you could count all of the records that were during consecutive minutes, but what if it ran twice over 2 minutes?

Maybe but what if a few times it didnt span consecutive minutes? As the example shows.

BaldingLoopMan SSCertifiable Points: 6378 More actions · Answer 4

anyone interested in the solution here it is. The solution was by good ol Itzik Ben-Gan. It's called Islands and Gaps. And it deals specifically w/ this solution to this issue. This is my first poke. however i will condense it a bit and try to make it all run off the original #delivered table w/o bringing in the #final table. None the less below is the solution as well as the link to "Islands and Gaps". Pretty interesting stuff.

http://msdn.microsoft.com/en-us/library/aa175780(SQL.80).aspx

--drop table #fianl

select datepart(mi, dateadded) gapID,datepart(hh,dateadded) hr, offerid

into #fianl

from #delivered

where datepart(hh,dateadded)=12

select t.offerid

, t.hr

, count(t.startofgroup) cnt

from (

SELECT t1.offerid

, t1.hr hr

, t1.gapID AS startOfGroup

, MIN(t2.gapID) AS endOfGroup

FROM (SELECT offerid, hr, gapID

FROM #fianl tbl1

WHERE NOT EXISTS(SELECT *

FROM #fianl tbl2

WHERE tbl1.gapID - tbl2.gapID = 1

and tbl1.offerid = tbl2.offerid

and tbl1.hr = tbl2.hr)) t1

INNER JOIN (SELECT offerid,hr, gapID

FROM #fianl tbl1

WHERE NOT EXISTS(SELECT *

FROM #fianl tbl2

WHERE tbl2.gapID - tbl1.gapID = 1

and tbl1.offerid = tbl2.offerid

and tbl1.hr = tbl2.hr)) t2

ON t1.gapID <= t2.gapID

and t1.offerid = t2.offerid

and t1.hr = t2.hr

where t1.offerid=576

GROUP BY t1.offerid, t1.gapID , t1.hr

)t

group by t.offerid

, t.hr

BaldingLoopMan SSCertifiable Points: 6378 More actions · Answer 5

BaldingLoopMan

SSCertifiable

Points: 6378

December 8, 2010 at 12:21 pm

#1260275

--Why not update the count in a pre-allocated table with (start_time, end_time) ranges already filled in?

Not sure what u mean. You saying adjust the process to insert a row into another table specifying start and end time?

Jeff Moden SSC Guru Points: 1000539 More actions · Answer 6

CELKO (12/8/2010)

set up and populate a table with the time slots defined by the start and end times, then update that table as you get data. It should be an in-place update which is fast.

No problem... let's see your code for that. Also please explain to the boss why you created a table that wastes have the space in empty rows and why it won't allow the duplicates that the machine keeps kicking out. 😉

--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.
"Change is inevitable... change for the better is not".

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)
Intro to Tally Tables and Functions

Jeff Moden SSC Guru Points: 1000539 More actions · Answer 7

@BaldingLoopMan,

This should do it compliments of some old but very reliable mag tape methods I learned in the 50's 😉 No need for an extra table, either.



WITH

cteGroupedDates AS

( --=== Find the unique dates and assign them to a group.

     -- The group looks like a date but the date means nothing except that adjacent

     -- dates will be a part of the same group.

 SELECT OfferID,

        UniqueDate = DateAdded,

        DateGroup  = DATEADD(mi, - ROW_NUMBER() OVER (ORDER BY OfferID, DateAdded), DateAdded),

        Hour       = DATEPART(hh,DateAdded)

  FROM #Delivered

  GROUP BY OfferID, DateAdded

)

,

ctePreAgg AS

( --=== This figures out the "islands" and a nice something extra

 SELECT OfferID,

        Hour,

--        MIN(UniqueDate),

--        MAX(UniqueDate),

        ContinuousMinutes = DATEDIFF(mi,MIN(UniqueDate),MAX(UniqueDate))+1

   FROM cteGroupedDates

  GROUP BY OfferID, DateGroup, Hour

) --=== Do the final aggregation

 SELECT OfferID,

        Hour,

        RunTimes      = Count(*),

        TotalDuration = SUM(ContinuousMinutes)

   FROM ctePreAgg

  GROUP BY OfferID, Hour

  ORDER BY OfferID, Hour

;

--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.
"Change is inevitable... change for the better is not".

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)
Intro to Tally Tables and Functions