Solved

Selecting data for the max date record in an aggregate query

Posted on 2015-01-27
4
116 Views
Last Modified: 2015-01-27
I am trying to write a query with following fields:

ID
Insurance
Amount
PayDate

The data has multiple records for each ID.  The Insurance is always SP.  I want to create a query that will return the
ID
Insurance
Max(Date) and the Amount associated with the Max(Date).

Thanks

Glen
0
Comment
Question by:GPSPOW
4 Comments
 
LVL 18

Accepted Solution

by:
Simon earned 500 total points
ID: 40573934
SELECT ID, Insurance, Amount,PayDate from tbl T where paydate=(select max(paydate) from tbl where ID=T.ID)

NB you may get more than one line for a given ID if there was more than one payment on the same max(Paydate).
0
 

Author Closing Comment

by:GPSPOW
ID: 40573957
Thanks

Worked Great!
0
 
LVL 65

Expert Comment

by:Jim Horn
ID: 40573967
Or, using a subquery..
SELECT ID, Insurance, yt_max.max_date, yt.PayDate
FROM YourTable yt
JOIN (
   SELECT ID, Insurance, Max(Date) as max_date
   FROM YourTable
   GROUP BY id, Insurance) yt_max ON yt.ID = yt_max.ID AND yt.date = yt_max.max_date

Open in new window


I have an article called SQL Server GROUP BY Solutions, scroll down to '5. Aggregate AND values from a single row that make up the aggregate: Subquery'
0
 
LVL 48

Expert Comment

by:PortletPaul
ID: 40574629
Only because it wasn't mentioned...

You can use row_number() for this
SELECT ID, Insurance, Amount,PayDate
FROM  (
      SELECT ID, Insurance, Amount,PayDate, row_number() over(partition by ID order by PayDate DESC) as rn
      FROM YourTable
      ) as derived
WHERE rn = 1

Open in new window


Here you can only get one row per ID even if there happens to be more than 1 payment on a paydate
0

Featured Post

Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

Question has a verified solution.

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

Having an SQL database can be a big investment for a small company. Hardware, setup and of course, the price of software all add up to a big bill that some companies may not be able to absorb.  Luckily, there is a free version SQL Express, but does …
Ever wondered why sometimes your SQL Server is slow or unresponsive with connections spiking up but by the time you go in, all is well? The following article will show you how to install and configure a SQL job that will send you email alerts includ…
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed
Via a live example, show how to set up a backup for SQL Server using a Maintenance Plan and how to schedule the job into SQL Server Agent.

910 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

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now