Query for duplicates. - Mailing list pgsql-sql

From Matthew Hagerty
Subject Query for duplicates.
Date
Msg-id 4.1.19990805123926.009fcbf0@mail.venux.net
Whole thread Raw
Responses Re: [SQL] Query for duplicates.
List pgsql-sql
Greetings,

I found myself in an unusual situation today.  I need a query to display
only customers with addresses that appear more than once.  Usually I am
having to get unique addresses, etc. at which I have become very good, but
this one is giving me a run for.

What I need is something like this:

create table customer (
custdate date,
name varchar(30),
address varchar(30),
city varchar(20),
state varchar(2),
zip varchar(10));


select address,city,state,zip from customer
where custdate<='05-30-1999'
group by address having count(address)>1;


I know this does not work, but if it did it would have the results I am
looking for.

Thanks,
Matthew


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