Message-ID: <3767C903.CB21EA1B@sferacarta.com>
Date: Wed, 16 Jun 1999 17:55:47 +0200
From: =?iso-8859-1?Q?Jos=E9?= Soares <jose@sferacarta.com>
MIME-Version: 1.0
To: Roland_DUBOULOZ <Roland.Dubouloz@bull.net>
CC: pgsql-sql@postgresql.org
Subject: Re: [SQL] date
References: <3767B63E.6A8AEF00@bull.net>
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Roland_DUBOULOZ ha scritto:

> I have a table like this :
>    table  books (name varchar , return_date date)
>
> The field return_date is not initialized :
> insert into books values (name1);
> insert into books values (namex);
>
> The field return_date is updated when the books is returned like this :
>
> update books set return_date='10-06-1999' where name=xxx;
>
> How can i select all the item where the return_date is not updated ?
>
> a request like this :
>
> select * from books where return_date=''  ????
>

SELECT * FROM books WHERE return_date IS NULL;

>
> (actually i initialised the return_date with the values '01-01-0001')
>
> thank you.
>
> --
> Roland Dubouloz                 BULL XS/BU
> BULL SA                         mailto:Roland.Dubouloz@bull.net
> 1,Rue de Provence               Phone :+33 (0)4 76 29 77 87
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> France                          Fax     : +33 (0)4 76 29 70 02

______________________________________________________________
PostgreSQL 6.5.0 on i586-pc-linux-gnu, compiled by gcc 2.7.2.3
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Jose'