?
Solved

Relating two tables, one which has more than one row per key in other table

Posted on 2007-12-06
2
Medium Priority
?
150 Views
Last Modified: 2010-04-21
I have one table named contact, which contains the the contact information from a user. This table contact, can have many rows for just one user, and some columns may be empty depending on what information what updated. How do I create a select statement which will select the contact_number field which is not equal to '' (apparently this particular column does not store nulls) and having the maximum modified date? For example....

select user.user_id, contact.contact_number
from user
join contact on user.user_id = contact.user_id
having max(contact.modified_date) and contact.contact_number <> ''

Any suggestions will be greatly appreciated. Thanks!
0
Comment
Question by:horalia
[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
2 Comments
 
LVL 25

Accepted Solution

by:
imitchie earned 2000 total points
ID: 20423011
select user.user_id,
  (select top 1 contact.contact_number from contact
    where user.user_id = contact.user_id
     and contact.contact_number <> ''
    order by modified_date desc) as contact_number
from user
0
 

Author Closing Comment

by:horalia
ID: 31413248
Thanks! Solution worked out great!
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

There are some very powerful Dynamic Management Views (DMV's) introduced with SQL 2005. The two in particular that we are going to discuss are sys.dm_db_index_usage_stats and sys.dm_db_index_operational_stats.   Recently, I was involved in a di…
I've encountered valid database schemas that do not have a primary key.  For example, I use LogParser from Microsoft to push IIS logs into a SQL database table for processing and analysis.  However, occasionally due to user error or a scheduled task…
If you’ve ever visited a web page and noticed a cool font that you really liked the look of, but couldn’t figure out which font it was so that you could use it for your own work, then this video is for you! In this Micro Tutorial, you'll learn yo…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…

743 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