Encountering SQL Error: ORA-01843: not a valid month

Question

I created a table using this query
CREATE TABLE Store (id number(11) primary key not null, opening_time timestamp CHECK (EXTRACT(HOUR FROM opening_time) > 8 || NUL

Answer 1

Good practice is using to_date function with your data format. In you case it will:

insert into Store 
values(1, to_date('04/04/2012 13:35', 'DD/MM/YYYY HH24:mi'));

More details about this function you can found here in official documentation.