mysql link statement doesn't return records without a link
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I have a table called Users in my database. A user can have multiple addresses, but in some cases they won't have any. My mysql link statement is only returning records which have at least one address:


    $query = ' SELECT DISTINCT a.id FROM users as a, addresses as b' ;
    $query.= ' WHERE a.id = b.userId ' ;

How can I alter this so that users with no addresses will still be returned?

I'm guessing theres a simple solution to this I'm just missing!

Thanks in advance.