sconeek@gmail.com wrote:
> hi all,
> i am working on this postgresql statement. it picks up all non-null
> values only. is there a way to pickup all hour values (if any hour
> value not existing, still find them and assign their value to be 0).
> coz my table does not contain all hour values, only ones which have a
> non-zero value.
>
> SELECT to_timestamp(to_char (last_edit_timestamp,'YYYY-MM-DD
> HH24:00:00'), 'YYYY-MM-DD HH24:00:00')AS edit_time, count(to_char
> (last_edit_timestamp,'YYYY-MM-DD HH24:00:00'))
> as edit_time_count FROM dbpt_containerlog GROUP BY to_char
> (last_edit_timestamp,'YYYY-MM-DD HH24:00:00') ORDER BY to_char
> (last_edit_timestamp,'YYYY-MM-DD HH24:00:00');
I don't think it's possible. It won't come up with a left outer join
because you aren't comparing to anything unless you have a second table
with all of the times you want to compare.
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