Solved

GROUP_CONCAT

Posted on 2010-11-08
2
770 Views
Last Modified: 2012-05-10
I'm trying to return all rows from a Business table (where RegionID is 1) while joining all phone numbers for that Business from the BusinessPhoneNumber table into a concatenated string, in a new column (say PhoneNumbers). My understanding is this can be done with GROUP_CONCAT() - here is my current SQL:

SELECT * FROM `Business`
LEFT JOIN `BusinessPhoneNumber` ON `BusinessPhoneNumber`.`ParentID` = `Business`.`ID`
WHERE `Business`.`RegionID` = 1

Please provide an example that uses GROUP_CONCAT to place the BusinessPhoneNumber's in a comma separated columns. FYI - the phone number field in that table is simply Phone (BusinessPhoneNumber.Phone).
0
Comment
Question by:level9wizard
[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 Comments
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 34087343
SELECT B.*, P.PhoneList
FROM Business B
LEFT JOIN
(
SELECT Business.ID, group_concat(BusinessPhoneNumber.Phone) PhoneList
FROM Business
INNER JOIN BusinessPhoneNumber ON BusinessPhoneNumber.ParentID = Business.ID
WHERE Business.RegionID = 1
) P ON P.ID = B.ID
WHERE B.RegionID = 1
0
 
LVL 58

Accepted Solution

by:
cyberkiwi earned 500 total points
ID: 34087349
Sorry left out a group by

SELECT B.*, P.PhoneList
FROM Business B
LEFT JOIN
(
SELECT Business.ID, group_concat(BusinessPhoneNumber.Phone) PhoneList
FROM Business
INNER JOIN BusinessPhoneNumber ON BusinessPhoneNumber.ParentID = Business.ID
WHERE Business.RegionID = 1
GROUP BY Business.ID
) P ON P.ID = B.ID
WHERE B.RegionID = 1
0

Featured Post

Enroll in May's Course of the Month

May’s Course of the Month is now available! Experts Exchange’s Premium Members and Team Accounts have access to a complimentary course each month as part of their membership—an extra way to increase training and boost professional development.

Question has a verified solution.

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

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…
Foreword This article was written many years ago, in the days when PHP supported the MySQL extension (http://php.net/manual/en/function.mysql-connect.php).  Today (http://php.net/manual/en/migration70.removed-exts-sapis.php) you would not use MySQL…
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 …
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…

751 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