update year in date column 2004-03-23 - By Riyaj Shamsudeen
Will this do ?
Alter session set nls_date_format= 'DD-MON-CYYYY-HH24:MI:SS ';
select * from mytabdate;
CUSTNO CRDATE
-- ---- -- -- ---- ---- ---- ---
1 16-SEP- 2099 00:00:00
1 08-OCT- 2099 00:00:00
update mytabdate
set crdate =
to_date(to_char(crdate, 'DD-MON- ')||
to_char(to_number(to_char(crdate, 'yyyy '))-100) ||
to_char(crdate, ' HH24:MI:SS ') , 'DD-MON-YYYY HH24:MI:SS ')
/
2 rows updated.
select * from mytabdate;
CUSTNO CRDATE
-- ---- -- -- ---- ---- ---- ---
1 16-SEP- 1999 00:00:00
1 08-OCT- 1999 00:00:00
Thanks
Riyaj "Re-yas " Shamsudeen
Certified Oracle DBA
-- --Original Message-- --
From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Barbara Baker
Sent: Tuesday, March 23, 2004 2:01 PM
To: oracle-l@(protected)
Subject: update year in date column
OK, I 'm just going to bite the bullet and claim total
ignorance here and see if someone takes pity on me :(
(sad face a nice touch, eh?)
Someone has accidently updated 378 records in the
customer table. The date changed from 1999 to 2099.
I need to change just the year back to 1999 for these
records. (I 'd like to keep the time stamp, if
possible. The month and day are correct.) I looked
on metalink, google, and asktom. Some nice examples,
but not what I really need.
Thought I 'd be clever and subtract 1000 from the date.
This works, but I don 't know how to get it formatted
back into a date.
I 'd prefer just sqlplus, but will use pl/sql if
necessary.
Here 's what I 've done so far:
(solaris 9 oracle 9.2.0.4)
JServer Release 9.2.0.4.0 - Production
DOC > CUSNO CUSNAME
CRDATE
DOC >-- ---- -- -- ---- ---- ---- ---- ---- ---- --
-- ---- --
DOC > 798489 GILBERT, ROSS
09/16/2099
DOC > 826744 HOEFLER, MATT
10/08/2099
DOC > 795126 FORT, JOETTA
09/08/2099
DOC >*/
SQL >
SQL > ---select to_date(to_char(crdate, 'MM/DD/YYYY '))
from customer where cusno=798489;
SQL > ---update advdb.custtest_barb
SQL > ---set crdate= to_char(crdate, 'MM/DD/YYYY '))
SQL > ---from customer where cusno=798489;
SQL >
SQL > select
to_date(to_char(crdate, 'ddmmyyyy ')-1000), 'MM/DD/YYYY ')
2 from customer where cusno=798489;
select
to_date(to_char(crdate, 'ddmmyyyy ')-1000), 'MM/DD/YYYY ')
*
ERROR at line 1:
ORA-00923 (See ORA-00923.ora-code.com): FROM keyword not found where expected
SQL >
SQL >
SQL > --- these both work
SQL > select to_char(crdate, 'ddmmyyyy ') from
custtest_barb where cusno=798489;
TO_CHAR(
-- -----
16092099
SQL > select to_char(crdate, 'ddmmyyyy ') - 1000 from
custtest_barb where cusno=798489;
TO_CHAR(CRDATE, 'DDMMYYYY ')-1000
-- ---- ---- ---- ---- ---- ---
16091099
Thank for any assistance.
Barb
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