Join If Exists in a MySQL query

I'm running a report that exports the information for members of committees into an excel spreadsheet.

Here's my query:

SELECT membership_organization.name AS Firm, 
membership_individual.first AS FirstName, 
membership_individual.middle AS MiddleName, 
membership_individual.last AS LastName, 
membership_individual.email AS Email, 
membership_individual.phone AS Phone, 
membership_location.addr1 AS Address1, 
membership_location.addr2 AS Address2, 
membership_location.city AS City, 
membership_location.state AS State, 
membership_location.zipcode AS Zip 
FROM membership_individual 
JOIN membership_organization ON membership_individual.org_name_id = membership_organization.id 
JOIN membership_location ON membership_individual.location_id = membership_location.id 
WHERE membership_individual.id IN ({list if ids}) 
ORDER BY LastName

The problem is some of the members don't ha开发者_运维知识库ve a location id set, or it's set to 0, so those members don't show up in the report.

Is there a way I can qualify the location JOIN? If the members location id exists pull the info, if not show me the info that is available.

Change both of your JOINs into LEFT JOINs. You'll get all your records from membership_individual where the where clause matches, and NULL values for the other tables where rows don't match.

Use a LEFT OUTER JOIN:

SELECT membership_organization.name AS Firm, 
membership_individual.first AS FirstName, 
membership_individual.middle AS MiddleName, 
membership_individual.last AS LastName, 
membership_individual.email AS Email, 
membership_individual.phone AS Phone, 
membership_location.addr1 AS Address1, 
membership_location.addr2 AS Address2, 
membership_location.city AS City, 
membership_location.state AS State, 
membership_location.zipcode AS Zip 
FROM membership_individual 
JOIN membership_organization ON membership_individual.org_name_id = membership_organization.id 
LEFT OUTER JOIN membership_location ON membership_individual.location_id = membership_location.id 
WHERE membership_individual.id IN ({list if ids}) 
ORDER BY LastName

Use left join, meaning your query will become

SELECT membership_organization.name AS Firm, 
membership_individual.first AS FirstName, 
membership_individual.middle AS MiddleName, 
membership_individual.last AS LastName, 
membership_individual.email AS Email, 
membership_individual.phone AS Phone, 
membership_location.addr1 AS Address1, 
membership_location.addr2 AS Address2, 
membership_location.city AS City, 
membership_location.state AS State, 
membership_location.zipcode AS Zip 
FROM membership_individual 
JOIN membership_organization ON membership_individual.org_name_id = membership_organization.id 
LEFT JOIN membership_location ON membership_individual.location_id = membership_location.id 
WHERE membership_individual.id IN ({list if ids}) 
ORDER BY LastName

and you'll get the data for all members, even the ones for whom there are no rows in the location table.

Try to use

LEFT JOIN membership_location ON membership_individual.location_id = membership_location.id 

instead of your variant..