Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

MySQL Query help

Posted on 2011-02-21
4
Medium Priority
?
276 Views
Last Modified: 2012-05-11
I have 2 tables joined by USERID:

TableA contains most of the details I need to select except for the
user's name, which I need to pull fom TableB

The problem is that TableB contains multiple records for each user and therefore when
I use something like:

select a.Col1
      , a.Col2
      , b.name
from TableA a
      , TableB b
where b.userID = a.userID

I get wrong info returned because of the multiple user records in TableB

How can I gt the join to look at DISTINCT values only in TableB ?
0
Comment
Question by:BrianFord
[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
  • 2
4 Comments
 
LVL 39

Expert Comment

by:Aaron Tomosky
ID: 34945305
Select *, (select name from table b where b.id = a.id) from a
0
 

Author Comment

by:BrianFord
ID: 34945348
sorry, doesn't work: sub-query returns more than 1 row
0
 
LVL 39

Accepted Solution

by:
Aaron Tomosky earned 1000 total points
ID: 34945404
If all the names in table b for that Id are the same just wrap  name in a max function
Max(name)
0
 

Author Closing Comment

by:BrianFord
ID: 34945632
Thanks very much,

Looks like this will work fine for me :)
0

Featured Post

Moving data to the cloud? Find out if you’re ready

Before moving to the cloud, it is important to carefully define your db needs, plan for the migration & understand prod. environment. This wp explains how to define what you need from a cloud provider, plan for the migration & what putting a cloud solution into practice entails.

Question has a verified solution.

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

Load balancing is the method of dividing the total amount of work performed by one computer between two or more computers. Its aim is to get more work done in the same amount of time, ensuring that all the users get served faster.
Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

715 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