From: Andreas <maps.on@gmx.net>
To: pgsql-sql <pgsql-sql@postgresql.org>
Subject: Question on imports with foreign keys
Date: Thu, 08 Dec 2011 07:48:51 +0100
Message-ID: <4EE05DD3.2080308@gmx.net> (raw)
Hi,
suppose you need to import a csv with standard ciolums like name,
adress, phone, ... and some additional text columns that need to be
split off into referenced tables.
Those lookup-tables will only be needed for a project with limited life
time so I create a schema that might be called "project_x". There I
create the necessary lookup tables.
The core of the import will be added to the customers table with
unlimited livespan. The customers table has a PKey id which is a serial.
I don't want to add FKey columns into customers for the new
lookup-tables so I create another table in project_x "projectinfos" that
stores those FKeys and another FKey that references customers.id.
First question: Is this a stupid aproach?
If not:
How is the easiest way to to find the customer.id of the new customers
so I can insert the projectinfos?
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To: pgsql-sql@postgresql.org
Cc: maps.on@gmx.net
Subject: Re: Question on imports with foreign keys
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