Solved

SQL - Top six per unit

Posted on 2008-06-20
11
305 Views
Last Modified: 2010-04-21
SELECT     TOP (6) StoreID, Location, OERDate AS Date, Rating, Score
FROM         dbo.*********
WHERE     (StoreID IN ('000001', '000005')) AND (OERDate BETWEEN '1/1/2003' AND '1/1/2008')
---------------------------------------------------
The above SQL gives the top six for the whole set.  I want to get the top six for each StoreID, so there would potentially be 12 records returned.
0
Comment
Question by:josephdaviskcrm
[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
  • 4
  • 4
  • 3
11 Comments
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 21831063
what is the primary key of the field?
also, what is the "order by" for the TOP ?
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 21831066
try this:

select * from
(
SELECT     StoreID, Location, OERDate AS Date, Rating, Score, ranking = dense_rank() over(partition by storeid order by rating asc)
FROM         dbo.tablename
WHERE     (StoreID IN ('000001', '000005')) AND (OERDate BETWEEN '1/1/2003' AND '1/1/2008')
) a
where ranking <= 6
0
 

Author Comment

by:josephdaviskcrm
ID: 21831175
angelIII:
the database object is  structure so there really isn't a primary key defined I don't think.  I guess if there had to be a primary key it would be storeID and Date together.  Also, sorry I forgot to add the order by clause, thats important.  I meant to add ORDER BY date DESC.  So that it selects the 6 items with the most recent dates from each unit.

chapmandew:
The dense_rank() over(partition by storeid order by rating asc) statement threw an error.  SQL Server said that it didn't support the OVER statement.  Also, can you explain what that code is supposed to do?  I'm not familiar with those commands.
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 60

Expert Comment

by:chapmandew
ID: 21831214
Are you sure that you're using 2005 and that your db compatability level is set to 90?

What it does is for each storeid that it partitions by (groups by) it orders them sequentially based on the order of the rating.  It's new functionality in SQL 2005.
0
 

Author Comment

by:josephdaviskcrm
ID: 21831247
Yeah I'm sure its 2005.  I don't know about the compatability level.  I'm working in a large organization on their database, so I'm sure that it should be all set up right.

Is there an easier way to do it thats not trying to use this new functionality?
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 21831290
Well, I just tried it on a 2005 instance with a compat. level of 80 and it worked fine.  

What do you get when you run this?

SELECT SERVERPROPERTY('ProductVersion')
0
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 250 total points
ID: 21831292
in case the database compatibility  is set to 80 (=sql 2000) and could not be changed:
SELECT t.StoreID, t.Location, t.OERDate AS Date, t.Rating, t.Score
  FROM dbo.********* t
 WHERE t.OERDate IN ( Select TOP 6 i.OERDate
                       FROM   dbo.********* i
                      WHERE i.StoreID = t.StoreID
                        AND i.OERDate BETWEEN '1/1/2003' AND '1/1/2008')
                      ORDER BY i.OERDate DESC
                    )
WHERE  t.StoreID IN ('000001', '000005')

Open in new window

0
 

Author Comment

by:josephdaviskcrm
ID: 21831558
chapmandew: 9.00.3054.00

angelIII: That code is throwing me an error too.  It says that it can't be parsed.

I'm just going to go through and grab the data one store at a time.  Thanks guys.
0
 
LVL 60

Assisted Solution

by:chapmandew
chapmandew earned 250 total points
ID: 21831582
Try this variation:

SELECT t.StoreID, t.Location, t.OERDate AS Date, t.Rating, t.Score
  FROM dbo.tabled t
 WHERE t.OERDate IN ( Select TOP 6 i.OERDate
                       FROM   dbo.tabled i
                      WHERE i.StoreID = t.StoreID
                        AND i.OERDate BETWEEN '1/1/2003' AND '1/1/2008'
                      ORDER BY i.OERDate DESC
                    )
AND  t.StoreID IN ('000001', '000005')
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 21831600
>angelIII: That code is throwing me an error too.  It says that it can't be parsed.
question: are you using the query designer?
answer: don't. it's too limited
0
 

Author Closing Comment

by:josephdaviskcrm
ID: 31469143
That second version worked perfectly.  Thanks to both of you.
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
CROSS APPLY 4 68
Format Date fields 11 54
Need help in debugging a UDF results 7 68
What is GIS method of Geometry data type? 6 26
Introduction: When running hybrid database environments, you often need to query some data from a remote db of any type, while being connected to your MS SQL Server database. Problems start when you try to combine that with some "user input" pass…
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
This video shows how to use Hyena, from SystemTools Software, to update 100 user accounts from an external text file. View in 1080p for best video quality.

734 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