Solved

mysql join where second table condition does not exist

Posted on 2009-05-16
5
314 Views
Last Modified: 2013-12-12
I have a table contact with key i_contact
I have a table schedule with a field i_contact
I need all contact.i_contact ids that meet certain criteria AND where they do not have a record in schedule with certain criteria.  There may be records in schedule, but I need those that do not have certain characteristics.

For example,
SELECT c.i_contact, c.i_broker, c.fname, c.lname, c.email, c.hphone, c.cphone, c.state, c.referral_source, c.fico, c.amort, c.profile_completed, c.paid, c.created, c.is_customer, c.deleted from contact
INNER JOIN primary_home as p on p.i_contact=c.i_contact AND p.isLiquid=1
LEFT OUTER JOIN schedule as s on s.i_contact=c.i_contact
AND (s.task Like '%meeting%' or s.task Like '%go to%' or s.task Like '%goto%' or s.task Like '%online%')
WHERE c.deleted=0
This gives me (I think) the data on contacts who's primary_home field isLiquid=1 and they have a record in schedule like the parameters listed above.  What I need is 2 things:
1.  am I right with the first query
2.  how do I reverse that and have it give me only those contacts who'se primary_home field isLiquid=1 who may or may not have records in schedule, but who do NOT have any record in schedule where the task is like (meeting, online, goto, go to)
0
Comment
Question by:thewebwench
  • 3
  • 2
5 Comments
 
LVL 14

Expert Comment

by:racek
ID: 24404223

SELECT c.i_contact, c.i_broker, c.fname, c.lname, c.email, c.hphone, c.cphone, c.state, c.referral_source, c.fico, c.amort, c.profile_completed, c.paid, c.created, c.is_customer, c.deleted 
from contact c
INNER JOIN primary_home as p on p.i_contact=c.i_contact AND p.isLiquid=1
LEFT OUTER JOIN schedule as s on s.i_contact=c.i_contact
AND (s.task Like '%meeting%' or s.task Like '%go to%' or s.task Like '%goto%' or s.task Like '%online%')
WHERE c.deleted=0 
and s.i_contact IS NULL

Open in new window

0
 
LVL 14

Accepted Solution

by:
racek earned 400 total points
ID: 24404231

SELECT c.i_contact, c.i_broker, c.fname, c.lname, c.email, c.hphone, c.cphone, c.state, c.referral_source, c.fico, c.amort, c.profile_completed, c.paid, c.created, c.is_customer, c.deleted 
from contact c
INNER JOIN primary_home as p on p.i_contact=c.i_contact AND p.isLiquid=1
LEFT OUTER JOIN schedule as s on s.i_contact=c.i_contact
WHERE c.deleted=0 
AND NOT (s.task Like '%meeting%' or s.task Like '%go to%' or s.task Like '%goto%' or s.task Like '%online%')

Open in new window

0
 

Author Comment

by:thewebwench
ID: 24404276
what's the difference between the two?  I think the first one is more right.  I get about expected results (not exact, but about) where with the second one I get hundreds more results -- I get all contacts with rows in schedule where those rows don't equal "online, meeting, etc."

I should be getting 45 results (unless my first query is not right)
I'm getting 42 with your query
0
 

Author Comment

by:thewebwench
ID: 24404293
never mind, I've gotten it to match; THANKS
0
 

Author Comment

by:thewebwench
ID: 24404297
I accidentally marked the wrong solution; it should have been the first one.
0

Featured Post

Use Case: Protecting a Hybrid Cloud Infrastructure

Microsoft Azure is rapidly becoming the norm in dynamic IT environments. This document describes the challenges that organizations face when protecting data in a hybrid cloud IT environment and presents a use case to demonstrate how Acronis Backup protects all data.

Question has a verified solution.

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

Suggested Solutions

Part of the Global Positioning System A geocode (https://developers.google.com/maps/documentation/geocoding/) is the major subset of a GPS coordinate (http://en.wikipedia.org/wiki/Global_Positioning_System), the other parts being the altitude and t…
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…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn how to dynamically set the form action using jQuery.

735 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