TO_DATE for use with only once

I need to take strings such as ' 12:30 ' and convert them to the format HH24.» When I try using TO_DATE I get an error this date format picture ends before converting all of the input string. The statement that I used for the test is:
select to_date('12:30 PM', 'HH24:MI') from dual
Is there a good way to do this?

Thank you!

Hello

If you want to read a date in a format and display it in a different format.
Use a format when you read (with TO_DATE) and a different format when you view (using TO_CHAR).

For example:

SELECT  TO_CHAR ( TO_DATE ( '12:30 PM'
                   , 'HH:MI AM'
                 )
          , 'HH24:MI'
          )
FROM     dual
;

This has actually nothing to do with "to_date for use with only once": the same answer would apply if one or both formats include year, month or day to (or instead of) hours and minutes.

Tags: Database

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