Re: update year in date column
- From: Mark Richard <mrichard@xxxxxxxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Wed, 24 Mar 2004 08:42:36 +1100
Barbara,
You could look at using the add_months() function... Just add -12,000
months like the statement below:
SQL> select sysdate, add_months(sysdate, -12000) from dual;
SYSDATE ADD_MONTHS(SYSDATE,-
-------------------- --------------------
24-mar-2004 08:42:07 24-mar-1004 08:42:07
Regards,
Mark.
Barbara Baker
<barbarabbaker@yah To:
oracle-l@xxxxxxxxxxxxx
oo.com> cc:
Sent by: Subject: update year in date
column
oracle-l-bounce@fr
eelists.org
24/03/2004 07:00
Please respond to
oracle-l
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: 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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