From: Victor Yegorov <viy@pirmabanka.lv>
To: pgsql-sql@postgresql.org
Subject: Re: complex query
Date: Mon, 3 Mar 2003 19:18:16 +0200
Message-ID: <20030303171816.GH9377@pirmabanka.lv> (raw)
In-Reply-To: <1046689145.1223.7.camel@MattGerg>
References: <1046689145.1223.7.camel@MattGerg>
* Matt Gerginski <mattgerg@users.sourceforge.net> [03.03.2003 19:11]:
> I have two tables, users and options. The common element between the
> tables is "username". I want to select the "email" from "user" but only
> if the "mailing_list" option is set to true in the "options" table.
>
> Here are the tables:
>
> select username, email from users;
> username | email
> ---------------+--------------------------------
> joe | joe@yahoo.com
> heidi | heidi@localhost
> payday | brant@localhost
> fake | fake@localhost
> mattgerg | mattgerg@users.sourceforge.net
> god | god@heaven.org
>
> select username, mailing_list from options;
> username | mailing_list
> ---------------+--------------
> payday | t
> god | t
> fake | t
> mattgerg | t
>
>
> I want to write a query that will return the emails of only the users
> payday, god, fake, and mattgerg.
>
> Is this at all possible? I am new to sql, and I am having trouble.
>
select u.username, u.email from users as u, options as o where u.username =
o.username and o.mailing_list = true;
You'd better read some book on SQL.
--
Victor Yegorov
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To: pgsql-sql@postgresql.org
Cc: viy@pirmabanka.lv
Subject: Re: complex query
In-Reply-To: <20030303171816.GH9377@pirmabanka.lv>
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