Search Postgresql Archives

What kind of JOIN, if any?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Folks:

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.

Again, any help would be appreciated.

Paul

-- 
Paul M. Foster

-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux