如何在 Oracle 的 SQL Developer 20.2 上为 11g 数据库注册小时数？

Question

I'm trying to register a DATE and and hour field on a table. DATE is there, but i can't find the TIME type for the hour field. Is there another way to make the thing? Or am i missing something? I'm trying to register the hour on a '11:30' format.

Answer 1

An Oracle date column always contains a day and a time. There would generally be no reason to have a separate column to store the time.

create table foo (
  my_date_col date
);

insert into foo( my_date_col ) 
  values( to_date( '2020-11-23 11:30', 'yyyy-mm-dd hh24:mi' ) );

select trunc( my_date_col ) date_data_type_at_midnight,
       to_char( my_date_col, 'yyyy-mm-dd' ) string_representation_of_day,
       to_char( my_date_col, 'hh24:mi:ss' ) string_representation_of_time
  from foo;

Answer 2

There is no time datatype in Oracle. There is a date datatype, that stores the date and time .

You did not explain your actual use case, but: most of the times, you don't need, and don't want, to store the date and times in two separate columns. You can use date , that stores both. Then you can use date functions to access the date and time parts separately if you really need to (or use computed columns).