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Date: Sun, 5 Jan 2003 04:18:37 -0800 (PST)
From: Ludwig Lim <lud_nowhere_man@yahoo.com>
Subject: Re: Deleting in order from a table
To: pginfo <pginfo@t1.unisoftbg.com>
Cc: PostgreSQL Mailing List <pgsql-sql@postgresql.org>
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--- pginfo <pginfo@t1.unisoftbg.com> wrote:
> I have a table tableA ( ....,order_num int).
> 
> I will to delete some records from tableA but in asc
> or desc
> order_num-order.
> 
> Is it possible to write delete from tableA where
> (some conditions) order
> by order_num ?
> 
> Many thanks,
> ivan.
> 

Try the following:

   DELETE
   FROM tableA
   WHERE order_num IN (
        SELECT order_num
        FROM tableA
        ORDER BY order_num
        LIMIT n OFFSET m);  

 Use LIMIT to determine the number of rows to delete
and OFFSET to determine the "starting row".

ludwig


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