Creating a view to cast the field type

Question

Hi All,
I had a table test with 2 fields key and time. time is of type timestamp.
i want to create a view on the table but cast the cast the time field from timestamp to datetime or date which can accomodiate the date and time.
I dont need the milli seconds in the view but require the date, time(hours:minutes:sec)
If anyone dis this earlies, please give some suggestions for me.
Regards,
KK

Answer 1

When i cast it to date only date "MM/DD/YY" is shown but time is not shown.Where are you looking to see this? A DATE column always has a time component. In order to display a date, however, it needs to be converted to a string. If you do not do an explicit TO_CHAR with an explicit format mask, in SQL*Plus, the conversion of a date to a string is governed by the session's NLS_DATE_FORMAT parameter. Various GUIs also have options to set or change the implicit format mask.
Most tools and databases default to only displaying the date component (the time component is always still there, it's just not displayed).
SQL> select * from vw_ts_to_date;
DT
27-FEB-09
SQL> select to_char( dt, 'DD-MON-YYYY HH24:MI:SS' ) dt_string
  2    from vw_ts_to_date;
DT_STRING
27-FEB-2009 16:58:09
SQL> ed
Wrote file afiedt.buf
  1* alter session set nls_date_format = 'DD-MON-YYYY HH24:MI:SS'
SQL> /
Session altered.
SQL> select * from vw_ts_to_date;
DT
27-FEB-2009 16:58:39Justin