Re: simple join problem - Mailing list pgsql-sql

From Josh Berkus
Subject Re: simple join problem
Date
Msg-id 200302191249.26342.josh@agliodbs.com
Whole thread Raw
In response to simple join problem  ("Matthew Nuzum" <cobalt@bearfruit.org>)
Responses Re: simple join problem  ("Matthew Nuzum" <cobalt@bearfruit.org>)
List pgsql-sql
Matthew,

> Can anyone demonstrate the correct syntax for joining several tables in this
> way?

Actually, there's several possible answers to your problem.  Here's one:

>
> Here's my view definition:
> SELECT
>     users.uid, users.loginid, users."password", users.title,
>     users.firstname, users.middlename, users.lastname, users.suffix,
>     users.organization, users.job_title, users_address.address1,
>     users_address.address2, users_address.address3, users_address.city,
>      users_address.state, users_address.zip, users_address.country,
>     users_email.email, users_phone.phone
> FROM (((users
>     LEFT JOIN users_address ON ((users.uid = users_address.uid AND
users_address.primary = TRUE)))
>     LEFT JOIN users_email ON ((users.uid = users_email.uid and
users_email.primary = TRUE)))
>     LEFT JOIN users_phone ON ((users.uid = users_phone.uid and
users_phone.primary = TRUE))) ;

It's a neat trick that join conditions can be *any* expression that evaluates
to a boolean value.

--
-Josh BerkusAglio Database SolutionsSan Francisco



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