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
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