phil campaigne wrote:
> Occasionally I want to store a null value for my java.sql.Time--> Time
> column in Postgresql.
> update event set game_clock=null where event_id=1;
>
> I can retreive the record with the null value (type Time) if I select on
> the primary key,
> select game_clock from event where event_id = 1;
>
> but when I try to select on the null column value, I get zero records.
> select * from event where game_clock=null;
>
Try
select * from event where game_clock is null;
A null value cannot be used in a comparison since it's undefined. You
have to explicitly query for something that has no value, hence the
different syntax.
Regards,
Thomas Hallgren
