Q: number concurrent sessions by hours in a specified interval

Hello

I have this table that contains the SESSIONID, CREATEDATE, LASTCHECKDATE, EXPIREDATE PARTNERID

We make a query that returns the number of max session competitor hours time for the specified interval.

For example, last week, on a per hour basis or bases the top competitor for each hour or day session day, according to the report.

can make the number of new session every hour with this request;

SELECT TO_CHAR (createdate, ' DD/MM/YYYY HH24') | ' h ' value of start_time, COUNT (SESSIONID) new_sessions name, | ' {' | partnerid |} '}' as a partner
To uws
WHERE expiredate IS NOT NULL
and partnerid = 25
and TO_CHAR(createdate,'YYYY/MM') = ' 2010/05 '
TO_CHAR Group (createdate, ' DD/MM/YYYY 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 aspect will have to run it on sqlplus from a script shell if possible and same graph on Google maps.

The help is appreciated, please note that I'm not an expert of the Oracle...

Published by: user11954725 on July 19, 2010 17:55

Hello

user11954725 wrote:
Thanks Frank,.

I think we are very close to the solution, I'm looking for now.

Here's the script you gave me (with few changes) and exit;

WITH all_hrs AS
(
SELECT min_hr + ((LEVEL-1) / 24) AS the period
, min_hr + (LEVEL / 24) AS next_period
DE)
SELECT TRUNC (MIN (createdate), 'HH') AS min_hr
, TRUNC (MAX (LASTHEARTBEATDATE), 'HH') AS max_hr

You may have noticed that this site normally compresses white space. When you post the text formatted (including the code or output) on this site, type the 6 characters:

\

(small letters only, inside curly brackets) before and after each formatted section, to preserve the spacing.

produce output;

Period SESSIONS
------------------------- ----------------------
19-APR-10 15
19-APR-10 12
19-APR-10 15
...
12-MAY-10 28
569 rows selected

This is very confusing for several reasons:
(a) it's not formatted.  Use \

tags, as mentioned above.
(b) you're not showing all the significant data. If you're GROUPing BY a date, TRUNCated to the hour, then the hour is significant, and you should show the hour, not just the year, month and day. Use the TO_CHAR function to include the hour in the display for this column, or ALTER SESSSION SET NLS_DATE_FORMAT ... to change the default display for all DATEs.
(c) There's much too much output, even with parts of it cut out. Devise some smaller sample that shows the problem.

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.

The in-line view in all_hours generates min_hr and max_hr.
If you want min_hr to be parameters that are not derived from data in your table, then you can select them from dual.
That is, instead of:

 ...     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')
           )

You can tell

...      FROM     (
                SELECT  TO_DATE ( '07-May-2010 00'
                         , 'DD-Mon-YYYY HH24'
                         )               AS min_hr
                ,       TO_DATE ( '07-May-2010 23'
                               , 'DD-Mon-YYYY HH24'
                         )               AS max_hr
                FROM     dual
           )

Probably, if we ask a few more days, we would like to display the MAX number of simultaneous session for a day and (optional) average also for that day and that all the days of the period.

So, for example, based on the output above that level next report would be output as follows (for the period from 19 April 10 to 27 April 10;

19 APRIL 10 24
20 APRIL 10 14
21 APRIL 10 26...

Yes, it is possible. You can have a single query which truncates dates either at the time or day, and instead of

...      CONNECT BY     LEVEL <= 1 + (24 * (max_hr - min_hr)

use something like

...      CONNECT BY     LEVEL <= 1 + (periods_per_day * (max_hr - min_hr)

where periods_per_day is 24 or 1, to generate the exact number of lines of output you want.
Give a specific example if you want to help. D.F.
"Thanks to this data to sample...
I would like to pass these parameters:...
and get this result:...
but, with the same data, if I pass these parameters:...
so I want this output:... »
Once more, there not need a lot of data. Maybe 10 rows, dated between 22:00 one day and 03:00 on the following day, would give a good example of the hourly production so that every day.

user11954725 wrote:
I am now looking to do an export of the table for you to test with real data.

It would be better? expdmp? and download a zip to a site?

Or if you are good for now with this small sample?

Small data sets are the best. It is easier for you to post, easier for you to manually draw the expected results, easier for everyone to understand and verify.
Display instructions INSERT.

By looking at the output once again, if the TIME period would show in the output that would be great, so maybe I can use it as input to another query that could be summarized per day?

Use the function TO_CHAR or ALTER SESSION SET NLS_DATE_FORMAT registration time at the exit of the DATEs.
As I mentioned above, you have a query that produces either hourly output, like this

period               sessions
----------------     --------
07-May-2010 21:00      5
07-May-2010 22:00      1
07-May-2010 23:00      6

or daily output, like this:

period               sessions
----------------     --------
07-May-2010            12

According to a parameter.
You might also have a query which produces two output types at the same time:

period               sessions     daily_total
----------------     --------     -----------
07-May-2010 21:00      5
07-May-2010 22:00      1
07-May-2010 23:00      6          12

Give a clear example of what you want, and someone will help you get it.

Published by: Frank Kulash, July 21, 2010 09:35

Tags: Database

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