From: | John Ziniti <ziniti(at)helix(dot)mgh(dot)harvard(dot)edu> |
---|---|
To: | SQL <pgsql-sql(at)postgreSQL(dot)org> |
Subject: | Re: [SQL] Updating datetime fields with NULL values |
Date: | 1999-11-16 22:58:09 |
Message-ID: | 3831E181.621187B9@helix.mgh.harvard.edu |
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Thread: | |
Lists: | pgsql-sql |
Hey Gary,
Use the keyword NULL as your value:
pipeline=> create table testme (datetimetest datetime);
CREATE
pipeline=> insert into testme (datetimetest) values ('now');
INSERT 1509043 1
pipeline=> select * from testme;
datetimetest
----------------------------
Tue Nov 16 17:56:09 1999 EST
(1 row)
pipeline=> update testme set datetimetest=NULL;
UPDATE 1
pipeline=> select * from testme;
datetimetest
------------
(1 row)
Gary MacMinn wrote:
>
> Morning All,
>
> Is it possible to clear a datetime field to NULL? If so, how? In trying an update (update test set d1='' where t1='Text2';) I get an error of Bad datetime external representation ''
>
> TIA,
> Gary MacMinn
> ===============================================
> Table = test
> +----------------------------------+----------------------------------+-------+
> | Field | Type | Length|
> +----------------------------------+----------------------------------+-------+
> | t1 | text | var |
> | d1 | datetime | 8 |
> +----------------------------------+----------------------------------+-------+
>
> ************
--
John Ziniti
Mass General Hospital
CVRC 149-4201
149 13th Street
Charlestown, MA 02129
tel (617) 726-4347
fax (617) 726-5806
ziniti(at)helix(dot)mgh(dot)harvard(dot)edu
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