From: Gary Stainburn <gary.stainburn@ringways.co.uk>
To: pgsql-sql@postgresql.org
Subject: efficient count/join query
Date: Fri, 7 Feb 2003 10:07:28 +0000
Message-ID: <200302071007.28697.gary.stainburn@ringways.co.uk> (raw)
Hi folks,
I've got two tables, first a history table containing tallies for staff/jobs
prior to going live, and second a roster table showing date, diagram, job
with one record per person per job per day. the tables are:
create table history (
hsid int4 not null references staff(sid),
hjid int4 not null references jobs(jid),
hcount int4,
primary key (hsid,hjid));
create table roster (
rodate date not null,
rogid int4 not null references diagrams(gid),
rojid int4 not null references jobs(jid),
rosid int4 references staff(sid),
primary key (rodate, rogid, rojid));
What's the best/quickest/cheapest way to create a view in the format of the
history table but including the details from the roster table for all records
prior to today.
I've been looking at some form of sub-select/join scheme but as some will only
exist on the history and some will only exist on the roster while many will
exist on both.
--
Gary Stainburn
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To: pgsql-sql@postgresql.org
Cc: gary.stainburn@ringways.co.uk
Subject: Re: efficient count/join query
In-Reply-To: <200302071007.28697.gary.stainburn@ringways.co.uk>
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