Gary,
First: Go out and buy "SQL for Smarties". Now. Read it.
However, I'll give you this one as a freebie:
> I've got a table 'phones' which has an indexed key 'pid' of type
> int4, and a
> phone number of type varchar(12).
>
> I've then got a table 'members' which as an index key 'mid' of type
> int4.
SELECT members.mid, members.name, members.address, hp.phone AS
home_phone, wp.phone AS work_phone, cp.phone as cell_phone
FROM members LEFT OUTER JOIN
(SELECT mid, phone FROM phones WHERE ptype = 'home') hp
ON members.mid = hp.mid
LEFT OUTER JOIN
(SELECT mid, phone FROM phones WHERE ptype = 'work') wp
ON members.mid = wp.mid
LEFT OUTER JOIN
(SELECT mid, phone FROM phones WHERE ptype = 'cell') cp
ON members.mid = cp.mid
ORDER BY members.name;
You're experiencing the usual problem encountered by procedural
programmers when they first start on SQL. SQL is a declarative
language, and requires a different knid of thinking than procedural
languages. Thus the use of table aliasing and subselects above.
Have fun!
-Josh
______AGLIO DATABASE SOLUTIONS___________________________
Josh Berkus
Complete information technology josh@agliodbs.com
and data management solutions (415) 565-7293
for law firms, small businesses fax 621-2533
and non-profit organizations. San Francisco
