?
Solved

MySQL: Duplicate Issue with INSERT INTO... From...

Posted on 2011-09-09
1
Medium Priority
?
274 Views
Last Modified: 2012-05-12
The problem with my query is it adds duplicates.

I do not want an item to be added it it was already added.
INSERT INTO `Group_Members` (`GroupID`,`MemberID`) SELECT '22', `ID` from `Member` WHERE `UserSuspended` != '1' AND `PremPlusMember` != '1' AND `PremWebMember` = '1' AND `SMSMember` != '1'

Open in new window

0
Comment
Question by:hankknight
[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
1 Comment
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 2000 total points
ID: 36511940
you have 2 options:
* use the ON DUPLICATE KEY.. syntax (resp the REPLACE syntax):
http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html

* or you write your query so it does not return duplicates, resp does not insert rows that are already in the table
INSERT INTO `Group_Members` (`GroupID`,`MemberID`) 
SELECT '22', `ID` from `Member` m
WHERE `UserSuspended` != '1' AND `PremPlusMember` != '1' AND `PremWebMember` = '1' AND `SMSMember` != '1'
 AND NOT EXISTS( select null from Group_Members g WHERE g.GroupID = 22 and g.MemberID = m.ID )

Open in new window

0

Featured Post

Get MongoDB database support online, now!

At Percona’s web store you can order your MongoDB database support needs in minutes. No hassles, no fuss, just pick and click. Pay online with a credit card. Handle your MongoDB database support now!

Question has a verified solution.

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

Introduction This article is intended for those who are new to PHP error handling (https://www.experts-exchange.com/articles/11769/And-by-the-way-I-am-New-to-PHP.html).  It addresses one of the most common problems that plague beginning PHP develop…
Containers like Docker and Rocket are getting more popular every day. In my conversations with customers, they consistently ask what containers are and how they can use them in their environment. If you’re as curious as most people, read on. . .
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…

762 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