Group by for doing 2 level of grouping

CityDescription
customerId visitId city description
1 101 201 ABC
1 102 201 ABC
1 102 201 PQR
1 401 301 XYZ
1 501 201 XYZ
2 301 201 ABC
3 601 501 ABC
We want result :-
number of same description for city given by user
1) For single a user count for same description for a city will be consider only once
Expected Result :-
city description count
201 ABC 2
201 PQR 1
201 XYZ 1
301 XYZ 1
501 ABC 1
Currently i am doing it by scaning the table twice
first group by customerId, city, description
then group by city, description
SQl :-
Select city, description, count(description) numberOfDescription
from
select customerId, city, description
from CityDescription
group by customerId, city, description
group by city, description;
is there any optimized way for the same.............
Thanks in advance

You may find help on this forum from some our experts, but this is a forum about the SQL Developer tool. Try the SQL forum.
Sue

Similar Messages

How to use other cols in group by which does not need grouping.

HI,
saleshistory table has sales record of each empoly, day wise.
that is saleshistory has more than one record of empid in it.
empcode is number(9,0) and empname is varchar2(200), sales number(10,5),empid is number(10,0)
select empid, sum(sales), max(empname), max(empcode) from saleshistory
group by empid ;
or
select empid, sum(sales), empname,empcode from saleshistory
group by empid ,empname,empcode ;
i want to find the total amout of sales done by each employee with empid,empname,empcode in select list.
1) please tel me which method good which i should follow or is there any other good way to get it.
yours sincerely
Edited by: 944768 on Apr 20, 2013 5:14 AM
Edited by: 944768 on Apr 20, 2013 5:15 AM
Edited by: 944768 on Apr 20, 2013 5:15 AM
Edited by: 944768 on Apr 20, 2013 5:16 AM
Edited by: 944768 on Apr 20, 2013 5:34 AM
Edited by: 944768 on Apr 20, 2013 7:08 AM

Hi,
This sounds like a job for the analytic SUM function.
Since you didn't post CREATE TABLE and INSERT statements for your own table, I can't test with your table. I'll show how to do his using the scott.emp table instead. In scott.emp, there can any number of rows with the same job, just as in your table there can be any number of rows for the same empid.
SELECT       job
,       sal
,       SUM (sal) OVER (PARTITION BY job)     AS total_sal
FROM       scott.emp
ORDER BY job
;Output:
JOB              SAL TOTAL_SAL
ANALYST         3000       6000
ANALYST         3000       6000
CLERK           1300       4150
CLERK            950       4150
CLERK            800       4150
CLERK           1100       4150
MANAGER         2850       8275
MANAGER         2975       8275
MANAGER         2450       8275
PRESIDENT       5000       5000
SALESMAN        1500       5600
SALESMAN        1250       5600
SALESMAN        1250       5600
SALESMAN        1600       5600Most aggregate functions (like SUM) have analytic counterparts which can get the same results without collapsing the result set down to one row per group. The PARTITION BY clause of analytic functions corresponds to the GROUP BY clause used with aggregate functions.
944768 wrote:
... when we used GTT in Stored proc (SP) is it necessary to truncate it at the begining of sp , if one truncate can it create any harm, as SP is used by many people at the same time.This seems to be a completely separate question. Most of your message involved grouping and the SUM function; it has nothing to do with Global Temporary Tables or stored procedures. You might have an application that uses a stored procedure and a global temporary table, and which also uses groupng and the SUM function, but that doesn't mean you hve a problem that involves all of them. If the stored procedure problem has anything to do with the grouping problem, explain it. If it is a completely separate problem, then start aompletely separate thread or it (and explain it).
I hope this answers your question.
If not, point out where the query above is producing the wrong reslts, and explain, using specific examples, how you get the correct results in those places.
If you want to use your own table, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and the results you want from that data.
Always say what version of Oracle you're using (e.g. 11.2.0.2.0).
See the forum FAQ {message:id=9360002}

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Hi
Refer to the following links for configuring N-Level Approval Workflow.
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http://help.sap.com/saphelp_srm50/helpdata/en/2c/e68d406b305537e10000000a1550b0/frameset.htm
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Does it have an RESTful API to schedule a Webi report with the parameter to specify a group of users ("Schedule For" to "Schedule for specified users and user groups" with one or more users/groups)?

Hello Ricardo,
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Hello friends at www.oracle.com ,
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Hello petpandian,
I have a little example that intends to demonstrate what I really need. Hope it is clear enough.
(Below you can see the output I am looking for)
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..................MONTH/YEAR
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The only solution I found was to calculate it manually via PL/SQL and inserting it into a temporary table. However, I think it is not the ideal solution because PL/SQL instructions have to handle the totals, something that Reports should do, and that's why I need help.
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DATADG/
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ASM is all about space savings, performance, and management :-).
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Request for Sticky #2 - Advanced Group Policy Troubleshooting Help

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Thanks for any help

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cor-el
Thank you for your swift reply. I don't know that this has helped me, as I've reached my level of tolerance for fooling with this annoying little problem - for today anyway. It has been going on since I "up" graded to Firefox 4. My wife is running 3.6.x on her laptop with none of this foolishness. As BLASPHEMOUS as it may sound, I've gone back to IE for the time being even though I don't like it 1000th as much as I do Firefox.
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>>The question is how outlook profile will be retained / automatically moved if the users move from once computer to other?
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> I have 2 different security group ( in a domain ) and i would like to
> deploy 2 different Computer GPO depends by the user SG membership
Not really, but for some settings there is a workaround... ->
http://evilgpo.blogspot.de/2012/03/how-to-save-my-screen.html
> this is a terminal server ( 2k12) and I would like have the computer
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Mal ein
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NO THEY ARE NOT EVIL, if you know what you are doing:
Good or bad GPOs?
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Looking for app to create Desktop groups/fences for OSX..
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https://itunes.apple.com/us/app/id561422617?mt=12
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Looking for app to create Desktop groups/fences for OSX..
I do music and like to keep my most important folders on my Desktop since I access them very frequently.. I saw that there's a few options out there like "Desktop Groups Lite" (link below):
https://itunes.apple.com/us/app/id561422617?mt=12
The only problem is that I'm reading a lot of reviews on it from users who are saying that their files/folders are going completely missing, etc.. And that's a big issue that I'm not ready to deal with, considering the importance of these folders to my work/career..
^This is a picture of what that "Desktop Groups Lite" app looks like.. and is pretty much EXACTLY what I'm looking for.. but I'm a little bit afraid of it "eating" my contents and losing them forever..
Does anybody have any recommendations or feedback for an app that can accomplish something like this?
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