From: hubert depesz lubaczewski <depesz@depesz.com>
To: Emi Lu <emilu@encs.concordia.ca>
Cc: pgsql-sql@postgresql.org
Cc: pgsql-general@postgresql.org
Subject: Re: Simple way to get missing number
Date: Tue, 24 Apr 2012 16:31:39 +0200
Message-ID: <20120424143139.GA7555@depesz.com> (raw)
In-Reply-To: <4F96B57E.8080306@encs.concordia.ca>
References: <4F96B57E.8080306@encs.concordia.ca>
On Tue, Apr 24, 2012 at 10:15:26AM -0400, Emi Lu wrote:
> May I know is there a simple sql command which could return missing
> numbers please?
> For example,
> t1(id integer)
> values= 1, 2, 3 .... 5000000
> select miss_num(id)
> from t1 ;
select generate_series( (select min(id) from t1), (select max(id) from
t1))
except
select id from t1;
Best regards,
depesz
--
The best thing about modern society is how easy it is to avoid contact with it.
http://depesz.com/
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To: pgsql-sql@postgresql.org
Cc: depesz@depesz.com, emilu@encs.concordia.ca, pgsql-general@postgresql.org
Subject: Re: Simple way to get missing number
In-Reply-To: <20120424143139.GA7555@depesz.com>
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