Skip site navigation (1) Skip section navigation (2)

Re: [GENERAL] Design

From: "David Ben-Yaacov" <David_BenYaacov(at)itd(dot)sterling(dot)com>
To: "R(dot)Stevens" <raimee(at)ij(dot)net>, "Postgres-General" <pgsql-general(at)postgreSQL(dot)org>
Subject: Re: [GENERAL] Design
Date: 1998-08-07 13:25:10
Message-ID: 001401bdc206$cd902450$ (view raw, whole thread or download thread mbox)
Lists: pgsql-general
My advice is to make the schema a little simpler.
Break out the Auction's vin-char(17) into different fields, with one field
being related to the BlackBook's vin-char(8).

Then you can do an outer join between the two tables by using the following:
  ... where = ...

If you want to get the Auction's different fields together, just append the
fields together.

Hope this helps
-----Original Message-----
From: R.Stevens <raimee(at)ij(dot)net>
To: Postgres-General <pgsql-general(at)postgreSQL(dot)org>
Date: Thursday, August 06, 1998 9:15 PM
Subject: [GENERAL] Design

>I really only need to start with a good plan.  I have the following
>I get data from two text files.  The first file contains BlckBook data
>on all vehicles.  It contains fields such as vin, make, model, year,
>The second file contains vehicle data specific to actual vehicles sold
>on an auction.  Some fields in this file are vin,  amount the vehicle
>auctioned for, Auctioners ID, etc...
>BlackBook                Auction
>-------                -----
>vin -char(8)              vin-char(17)
>year -char(1)           AuctionId
>The files are related by the following:
> + BlackBook.year == +
>That  is, the BlackBook vin field and year field match the Auction vin
>field characters 1 through eight plus character ten.  Character nine is
>I need to access the Black Book Data (fields including make, blackbook
>value, etc..) for a given vehicle in the Auction File.   I am not sure
>of the best way to accomplish this.
>Eventually I will have approx. 200K records in the Auction file and
>about 82K records in the BlackBook file.
>I see only one option:
>1)  Build a third table (or view, Although multiple views will be needed
>later to establish levels of authorization).
>This third table can be construced by reading records from the Auction
>File (table), matching a valid vin number and then selecting required
>fields from both
>tables and copying them to the New table.   My problem here is with the
>implementation.  Do I use a subquery?  Or a function?  Not sure how to
>build the function !
>I need some help here.  Any suggestions??

pgsql-general by date

Next:From: Chris HardieDate: 1998-08-08 00:49:58
Subject: Postgres CGI Security Problem
Previous:From: Tom GoodDate: 1998-08-07 12:42:05
Subject: Re: [GENERAL] Switch database inside psql?

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group