Solved

CTE Row Number question

Posted on 2011-09-20
5
386 Views
Last Modified: 2013-11-05
When i run the following Query, i get the following Results.  My question is, why are the row numbers all the number '1'.  I was hoping for 1,2,3,4,5,6 row numbers.

Query:
With cte_PatientProviders as
(select distinct(lp.desc_30) as Provider,Max(CONVERT(varchar(8), pe.enc_timestamp, 112)) as Enc_Date from patient_encounter pe
inner join lrdc_providers lp on lp.provider_id = pe.rendering_provider_id
where pe.person_id = (select person_id from patients where patients.Chart# = '973903')
group by lp.desc_30)

select * from (select *, row_number() over
(partition by Provider order by enc_date desc) as TEST from cte_PatientProviders) X

Results:
Provider                           Enc_Date
Beadle MD, Beverly      20110919
Beaton MD, J Neal      20050406
Silvoso MD, Gerald R      20000808
Trigg MD, Laura      20110805
Williams MD, Paul      20070409

0
Comment
Question by:mholbert
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 53

Expert Comment

by:Huseyin KAHRAMAN
ID: 36568262
I dont see any row number in the result...
0
 
LVL 53

Expert Comment

by:Huseyin KAHRAMAN
ID: 36568269
try not using partition...

select * from (select *, row_number() over (order by enc_date desc) as TEST from cte_PatientProviders) X
0
 

Author Comment

by:mholbert
ID: 36568272
oops, pasted wrong results.

Provider                           Enc_Date      TEST
Beadle MD, Beverly      20110919      1
Beaton MD, J Neal      20050406      1
Silvoso MD, Gerald R      20000808      1
Trigg MD, Laura      20110805      1
Williams MD, Paul      20070409      1
0
 
LVL 53

Accepted Solution

by:
Huseyin KAHRAMAN earned 125 total points
ID: 36568352
because you group by Provider, and then order within group by enc_date, and there is only one record in each group, you get 1 all the time... if you don't group (partition) and use row_number by just ordering the result, you will get 1,2,3,...
0
 

Author Comment

by:mholbert
ID: 36568417
awesome, gives me precisely what i need.  Apparently i need to better understand the Partition stuff.

thx.  MH
0

Featured Post

Webinar: Aligning, Automating, Winning

Join Dan Russo, Senior Manager of Operations Intelligence, for an in-depth discussion on how Dealertrack, leading provider of integrated digital solutions for the automotive industry, transformed their DevOps processes to increase collaboration and move with greater velocity.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Foreword In the years since this article was written, numerous hacking attacks have targeted password-protected web sites.  The storage of client passwords has become a subject of much discussion, some of it useful and some of it misguided.  Of cou…
This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question