On Thu, Sep 17, 2009 at 10:29:11AM -0400, Paul M Foster wrote: > I can't find a way to do this purely with SQL. Any help would be > appreciated. > > Table 1: urls > > id | url > -------------- > 1 | alfa > 2 | bravo > 3 | charlie > 4 | delta > > Table 2: access > > userid | url_id > --------------- > paulf | 1 > paulf | 2 > nancyf | 2 > nancyf | 3 > > The access table is related to the url table via url_id = id. > > Here's what I want as a result of a query: I want all the records of the > url table, one row for each record, plus the userid field that goes with > it, for a specified user (paulf), with NULLs as needed, like this: > > userid | url > ------------- > paulf | alfa > paulf | bravo > | charlie > | delta > > I can do *part* of this with various JOINs, but the moment I specify > userid = 'paulf', I don't get the rows with NULLs. SELECT userid, url FROM urls LEFT OUTER JOIN (select * from access where userid = 'paulf') AS access ON access.url_id = urls.id; -- Mark http://www.lambic.co.uk
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