Message-ID: <3E6E4B16.4060700@esc1.com>
Date: Tue, 11 Mar 2003 15:46:14 -0500
From: Terry Lee Tucker <terry@esc1.com>
Organization: Enhanced Solutions Computing
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To: Terry Lee Tucker <terry@turbocorp.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Novice needs help
References: <3E6E2139.5060903@esc1.com>
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I answered my own question. Yes, it can be done like this:

SELECT code, name, city, country, province FROM cust WHERE (country, 
province) NOT IN
    (SELECT country, code FROM province);

The query returned two cust records that had bogus province codes in 
them. Very cool :o)

Terry Lee Tucker wrote:

> I have loaded over 29,000 customer records into a database. I'm trying 
> to apply a referential foreign key that validates the country code and 
> the province code in another table. It won't work because somewhere in 
> that 29,000 records there is a province code or country code that 
> doesn't match. Is there a way to use a select statement to find out 
> which customer records has the invalid data? Here is the partial table 
> layout:
>
> cust                                                            province
> --------                                                 -------
> country                      ===>                       country
> province                    ===>                       code
>
> Thanks in advance...
>

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