Q: Count concurrent sessions per hours in a specified interval

Hi,
I have this table wich contains SESSIONID, CREATEDATE, LASTCHECKDATE, EXPIREDATE, PARTNERID
We need to make a query that would return the number of max concurent session per hours for the interval specified.
For example, for last week, on a per hour bases, or day bases, the top concurent session for each hour or day depending on the report.
can do the number of new session on each hour with this query;
SELECT TO_CHAR(createdate, 'YYYY/MM/DD HH24') ||'h ' start_time, COUNT( SESSIONID ) new_sessions, name || ' {' || partnerid || '}' as Partner
FROM uws
WHERE expiredate IS NOT NULL
and partnerid=25
and TO_CHAR(createdate,'YYYY/MM') = '2010/05'
group by TO_CHAR(createdate, 'YYYY/MM/DD HH24') ||'h ', name || ' {' || partnerid || '}'
ORDER BY 1 DESC;
I think I should use MAX(count(sessionid)) and probably some DECODE when c1 between createdate and lastcheckdate...
This would need to run on sqlplus from a shell script if possible and even chart it on Google Charts.
Any help appreciated, note that I am not an Oracle expert..
Edited by: user11954725 on Jul 19, 2010 5:55 PM

Thanks Frank,
I think we are very close to the solution I am looking for now;
Here is the script you gave me (with little modifications) and the output;
WITH     all_hrs          AS
     SELECT     min_hr + ((LEVEL - 1) / 24)     AS period
     ,     min_hr + (LEVEL / 24)     AS next_period
     FROM     (
               SELECT TRUNC (MIN (createdate), 'HH')     AS min_hr
               ,     TRUNC (MAX (LASTHEARTBEATDATE), 'HH')     AS max_hr
               FROM     userwebsession
where createdate <= TO_DATE('07-MAY-2010 00.00.00','DD-MON-RR HH24.MI.SS')
and LASTHEARTBEATDATE >= TO_DATE('07-MAY-2010 23.59.59','DD-MON-RR HH24.MI.SS')
     CONNECT BY     LEVEL <= 1 + (24 * (max_hr - min_hr))
SELECT     TO_DATE(a.period,'DD-MON-YY hh24') "Period"
,     COUNT (u.userwebsessionid)     AS sessions
FROM          all_hrs     a
LEFT OUTER JOIN     userwebsession     u     ON     a.period     <= u.LASTHEARTBEATDATE
                    AND     u.createdate     <= a.next_period
group by a.period
ORDER BY a.period
               SELECT TRUNC (MIN (createdate), 'HH')     AS min_hr
               ,     TRUNC (MAX (LASTHEARTBEATDATE), 'HH')     AS max_hr
               FROM     SPEAKESL.userwebsession
where createdate <= TO_DATE('07-MAY-2010 00.00.00','DD-MON-RR HH24.MI.SS')
and LASTHEARTBEATDATE >= TO_DATE('07-MAY-2010 23.59.59','DD-MON-RR HH24.MI.SS');
produce output;
Period SESSIONS
19-APR-10 15
19-APR-10 12
19-APR-10 15
19-APR-10 18
19-APR-10 6
19-APR-10 7
19-APR-10 6
19-APR-10 16
19-APR-10 18
19-APR-10 21
19-APR-10 19
19-APR-10 24
19-APR-10 15
19-APR-10 7
19-APR-10 10
19-APR-10 6
19-APR-10 9
19-APR-10 7
19-APR-10 6
20-APR-10 5
20-APR-10 5
20-APR-10 6
20-APR-10 7
20-APR-10 7
20-APR-10 13
20-APR-10 7
20-APR-10 6
20-APR-10 4
20-APR-10 8
20-APR-10 8
20-APR-10 6
20-APR-10 14
20-APR-10 7
20-APR-10 5
20-APR-10 14
20-APR-10 9
20-APR-10 9
20-APR-10 7
20-APR-10 5
20-APR-10 4
20-APR-10 5
20-APR-10 3
20-APR-10 4
21-APR-10 4
21-APR-10 5
21-APR-10 5
21-APR-10 5
21-APR-10 5
21-APR-10 5
21-APR-10 6
21-APR-10 7
21-APR-10 8
21-APR-10 14
21-APR-10 7
21-APR-10 8
21-APR-10 4
21-APR-10 6
21-APR-10 10
21-APR-10 26
21-APR-10 14
21-APR-10 10
21-APR-10 12
21-APR-10 6
21-APR-10 7
21-APR-10 6
21-APR-10 5
21-APR-10 6
22-APR-10 7
22-APR-10 7
22-APR-10 7
22-APR-10 6
22-APR-10 7
22-APR-10 8
22-APR-10 9
22-APR-10 5
22-APR-10 21
22-APR-10 7
22-APR-10 34
22-APR-10 29
22-APR-10 29
22-APR-10 10
22-APR-10 21
22-APR-10 17
22-APR-10 50
22-APR-10 43
22-APR-10 43
22-APR-10 26
22-APR-10 13
22-APR-10 16
22-APR-10 15
22-APR-10 35
23-APR-10 6
23-APR-10 3
23-APR-10 4
23-APR-10 4
23-APR-10 2
23-APR-10 3
23-APR-10 2
23-APR-10 2
23-APR-10 4
23-APR-10 11
23-APR-10 6
23-APR-10 14
23-APR-10 16
23-APR-10 20
23-APR-10 11
23-APR-10 20
23-APR-10 43
23-APR-10 30
23-APR-10 46
23-APR-10 41
23-APR-10 26
23-APR-10 50
23-APR-10 51
23-APR-10 66
24-APR-10 4
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 2
24-APR-10 5
24-APR-10 5
24-APR-10 3
24-APR-10 2
24-APR-10 3
24-APR-10 5
24-APR-10 6
24-APR-10 5
24-APR-10 4
24-APR-10 3
24-APR-10 4
24-APR-10 4
24-APR-10 2
24-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 2
25-APR-10 3
25-APR-10 3
25-APR-10 4
25-APR-10 4
25-APR-10 4
25-APR-10 3
25-APR-10 2
25-APR-10 2
25-APR-10 5
25-APR-10 6
25-APR-10 4
25-APR-10 5
25-APR-10 4
25-APR-10 5
25-APR-10 6
25-APR-10 5
25-APR-10 3
25-APR-10 3
09-MAY-10 7
09-MAY-10 8
09-MAY-10 8
09-MAY-10 6
09-MAY-10 8
09-MAY-10 8
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
09-MAY-10 5
10-MAY-10 7
10-MAY-10 6
10-MAY-10 6
10-MAY-10 7
10-MAY-10 5
10-MAY-10 5
10-MAY-10 5
10-MAY-10 5
10-MAY-10 6
10-MAY-10 12
10-MAY-10 12
10-MAY-10 20
10-MAY-10 12
10-MAY-10 13
10-MAY-10 14
10-MAY-10 17
10-MAY-10 12
10-MAY-10 15
10-MAY-10 14
10-MAY-10 12
10-MAY-10 8
10-MAY-10 8
10-MAY-10 7
10-MAY-10 7
11-MAY-10 7
11-MAY-10 7
11-MAY-10 8
11-MAY-10 8
11-MAY-10 7
11-MAY-10 30
11-MAY-10 37
11-MAY-10 43
11-MAY-10 22
11-MAY-10 14
11-MAY-10 17
11-MAY-10 19
11-MAY-10 26
11-MAY-10 20
11-MAY-10 20
11-MAY-10 30
11-MAY-10 14
11-MAY-10 18
11-MAY-10 11
11-MAY-10 12
11-MAY-10 8
11-MAY-10 8
11-MAY-10 10
11-MAY-10 8
12-MAY-10 14
12-MAY-10 12
12-MAY-10 75
12-MAY-10 51
12-MAY-10 38
12-MAY-10 39
12-MAY-10 22
12-MAY-10 17
12-MAY-10 13
12-MAY-10 12
12-MAY-10 11
12-MAY-10 17
12-MAY-10 30
12-MAY-10 28
12-MAY-10 23
12-MAY-10 20
12-MAY-10 18
12-MAY-10 12
12-MAY-10 15
12-MAY-10 16
12-MAY-10 14
12-MAY-10 28
569 rows selected
MIN_HR MAX_HR
19-APR-10 12-MAY-10
Now the output seem to produce the concurrent sessions as needed but the date range show is not exactly.
I expect the output to display only for the range specified in parameter, which if for this example only one day.
Probably if we ask for more that few days, we would like to display the MAX number of concurrent session for one day and the average (optional) also for that day and this for all days in the period.
So for example based on the above output this next level report would output as follow (for period of 19-APR-10 to 27-APR-10;
19-APR-10 24
20-APR-10 14
21-APR-10 26
22-APR-10 50
23-APR-10 66
24-APR-10 6
25-APR-10 6
26-APR-10 105
27-APR-10 44

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Im editing in imovie 6.0.4.
I always back up my files by exporting via imovie "full quality" when i used to do this with SD content i would get a DV file as result, now on HD i get a .mov file.
I used to get a 12GB file for a 60min movie. Now with HD i am getting 29GB per hour.
I hear other people talking about 12GB per hour for HD content.
Can anyone please tell me how this is possible?
I am going through external hard drives at lightning speed!
Thanks
Dave

Hi Dave
There's actually a big difference between a DV stream (whether recorded to tape or file) and a .mov file.
DV or HDV footage is recorded at 25Mbps - megabits per second. This translates to 90000Mb per hour, divide by 8 to convert bits to bytes, and you get 11.2GB/hour. That's constant, whether on the tape or saved as a DV file. Note that DV is pretty compressed.
Now, when iMovie (or any other video conversion program) saves a .mov file, it's no longer a DV stream. It can be any of the codecs (video formats) that your program supports, and there are a wide range of codecs for both SD and HD. These different codecs will use different file sizes depending on their level of compression. (Just like mp3, a compressed audio codec, vs AIFF, an uncompressed codec.)
You can choose to optimize video on import or choose a smaller format on export (large, rather than full size) which will reduce the frame size of your footage, which may be a good solution for you, depending on what you ultimately plan to do with the material. (Edit: actually, not with iMovie 6 - thanks, Karsten Newer versions of iMovie will help you there. )
Matt
Message was edited by: Matt Clifton

What setting is 'DVD quality' widescreen - ie about 3gb per hour?

I have videod (isn't that a such a quaint 20th century word for the podcast age?) a conference and I want to archive the footage to store on a DVD for later reediting.
The "full quality" setting is massive, I only have 90 mins, but a 20 min clip takes up over 10Gb
The 'CD-rom quality' is just not not dvd quality.
(I am using iMovie 06 btw, i will move onto 08 when it is finished)
Ideally, I would just burn the whole lot raw with iDVD and import it again if i need to reedit - but (for copyright as opposed to technical reasons i suppose) we can't just put a dvd in the slot and rip it like we can an audio cd in iTunes. I have tried the workarounds - but none of them worked for me.
Anyway, I digress: What setting is 'DVD quality' widescreen - ie about 3gb per hour?

Hi there.
*Keep the quality*
0nce you have compressed data - you can't get the original quality back - so store as full quality as possible - and in several formats so there is always a backup.
Media
data cds don't hold that much - 700mb - so forget about them for quality productions and archiving
dvd-roms hold much more - 4,700mb (you can get dual layer ones that double it)
*'share' settings*
Now, you have 2 options for saving the movie;
1. as a file on a DVD-Rom (a compact .mov or a massive.dv)
2. as a proper playable DVD (iDVD)
If the "full quality" iM setting is too big a file for a dvd-rom (and you will be lucky to get 10 mins of footage in 4.7gb), then you could 'iDVD' it and that way you will get a good quality movie up to nearly 2 hours on a disc disc that can be played on most machines (and could even be ripped back into an editable form using third party software)
Alternatively, save it using 'expert settings' listed above and you will probably get good enough results for a longer film without having to burn it as a playable (but uneditable) dvd.
Bear in mind that unless you are using a pro camera, you may not notice the much difference with the higher settings.
Good luck - seeing your work on the big screen is a blast!

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