UNDERSTAND THE NEW DATE AND TIME DATA TYPES IN ORACLE 9I

Question

제품 : SQL*PLUS
작성날짜 : 2001-08-01
UNDERSTAND THE NEW DATE AND TIME DATA TYPES IN ORACLE 9I
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PURPOSE
Oracle 9i 에서 소개되는 새로운 datetime data type 에 대해 소개한다.
Explanation
Example
1. Datetime Datatypes
1) TIMESTAMP
: YEAR/MONTH/DAY/HOUR/MINUTE/SECOND
2) TIMESTAMP WITH TIME ZONE
: YEAR/MONTH/DAY/HOUR/MINUTE/SECOND/
TIMEZONE_HOUR/TIMEZONE_MINUTE( +09:00 )
or TIMEZONE_REGION( Asia/Seoul )
3) TIMESTAMP WITH LOCAL TIME ZONE
: YEAR/MONTH/DAY/HOUR/MINUTE/SECOND
4) TIME WITH TIME ZONE
: HOUR/MINUTE/SECOND/TIMEZONE_HOUR/TIMEZONE_MINUTE
2. Datetime Fields
1) YEAR/MONTH/DAY/HOUR/MINUTE
2) SECOND(00 to 59.9(N) is precision) : Range 0 to 9, default is 6
3) TIMEZONE_HOUR : -12 to 13
4) TIMEZONE_MINUTE : 00 to 59
5) TIMEZONE_REGION : Listed in v$timezone_names
3. DATE 와 TIMESTAMP 와의 차이점
SQL> select hiredate from emp;
HIREDATE
17-DEC-80
20-FEB-81
SQL> alter table employees modify hiredate timestamp;
SQL> select hiredate from employees;
HIREDATE
17-DEC-80 12.00.00.000000 AM
20-FEB-81 12.00.00.000000 AM
단, 해당 Column 에 Data 가 있다면 DATE/TIMESTAMP -> TIMESTAMP WITH
TIME ZONE 으로 Convert 할 수 없다.
SQL> alter table employees modify hiredate timestamp with time zone;
alter table employees modify hiredate timestamp with time zone
ERROR at line 1:
ORA-01439: column to be modified must be empty to change datatype
4. TIMESTAMP WITH TIME ZONE Datatype
TIMESTAMP '2001-05-24 10:00:00 +09:00'
TIMESTAMP '2001-05-24 10:00:00 Asia/Seoul'
TIMESTAMP '2001-05-24 10:00:00 KST'
5. TIMESTAMP WITH LOCAL TIME ZONE Datatype
SQL> create table date_tab (date_col TIMESTAMP WITH LOCAL TIME ZONE);
SQL> insert into date_tab values ('15-NOV-00 09:34:28 AM');
SQL> select * from date_tab;
DATE_COL
15-NOV-00 09.34.28.000000 AM
SQL> alter session set TIME_ZONE = 'EUROPE/LONDON';
SQL> select * from date_tab;
DATE_COL
15-NOV-00 12.34.28.000000 AM
6. INTERVAL Datatypes
1) INTERVAL YEAR(year_precision) TO MONTH
: YEAR/MONTH
: Year_precision default value is 2
SQL> create table orders (warranty interval year to month);
SQL> insert into orders values ('2-6');
SQL> select warranty from orders;
WARRANTY
+02-06
2) INTERVAL DAY (day_precision) TO SECOND (fractional_seconds_precision)
: DAY/HOUR/MINUTE/SECOND
: Logon time 확인시 주로 사용
: day_precision range 0 to 9, default is 2
SQL> create table orders (warranty interval day(2) to second);
SQL> insert into orders values ('90 00:00:00');
SQL> select warranty from orders;
WARRANTY
+90 00:00:00.000000
7. Interval Fields
- YEAR : Any positive or negative integer
- MONTH : 00 to 11
- DAY : Any positive or negative integer
- HOUR : 00 to 23
- MINUTE : 00 to 59
- SECOND : 00 to 59.9(N) where 9(N) is precision
8. Using Time Zones
1) Database operation
- Defined at CREATE DATABASE
- Can be altered with ALTER DATABASE
- Current value given by DBTIMEZONE
2) Session operation
- Defined with environment variable ORA_SDTZ
- Can be altered with ALTER SESSION SET TIME_ZONE
- Current value given by SESSIONTIMEZONE
3) TIMESTAMP WITH LOCAL TIMEZONE
- TIME_ZONE Session parameter
: O/S Local Time Zone
Alter session set time_zone = '-05:00';
: An absolute offset
Alter session set time_zone = dbtimezone;
: Database time zone
Alter session set time_zone = local;
: A named region
Alter session set time_zone = 'America/New_York';
Reference Document
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Answer 1

Hi ,
I am facing the same problem and my scenario is also same (BAPI's).
So can you please tell me how you overcome this problem .
Thanks,
Rahul