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From: "Sabin Coanda" <sabin.coanda@deuromedia.ro>
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Subject: Re: ISO time zone format
Date: Wed, 5 Sep 2007 17:54:24 +0300
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>
> For the moment, you'll have to use extract() to pick out the bit(s) you 
> need:
>   to_char(extract(timezone_hour from current_timestamp), 'S00');
>

It's perfect for me, thanks a lot.
Sabin