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From: ashish <ashish.karalkar@netcore.co.in>
To: Volkan YAZICI <yazicivo@ttmail.com>
Cc: novice <user.postgresql@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: count question
Date: Wed, 09 Apr 2008 11:30:19 +0530
Message-ID: <47FC5B73.1040300@netcore.co.in> (raw)
In-Reply-To: <87ej9fr3kh.fsf@alamut.mobiliz.com.tr>
References: <ddcb1c340804081851y245f4776g9de74b5715e3a3e@mail.gmail.com>
	<87ej9fr3kh.fsf@alamut.mobiliz.com.tr>

Volkan YAZICI wrote:
> On Wed, 9 Apr 2008, novice <user.postgresql@gmail.com> writes:
>   
>> Is it possible to write a query to produce:
>>
>>  meter_id | no_of_bays |   bay_id
>> ----------+------------+-----------
>>      5397 |          2 |   5397-01
>>      5397 |          2 |   5397-02
>>      5409 |          3 |   5409-01
>>      5409 |          3 |   5409-02
>>      5409 |          3 |   5409-03
>>     
>
> Shouldn't this function be the responsitibility of client software,
> instead of database?
>
>
> Regards.
>   

May be this will help you


ashish=# select
meter_id,no_of_bays,meter_id||'-'||generate_series(1,no_of_bays) from meter;
meter_id | no_of_bays | ?column?
----------+------------+----------
5397 | 2 | 5397-1
5397 | 2 | 5397-2
5409 | 3 | 5409-1
5409 | 3 | 5409-2
5409 | 3 | 5409-3

With Regards
Ashish

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