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update year in date column

update year in date column

2004-03-23       - By Riyaj Shamsudeen

Reply:     <<     11     12     13     14     15     16     17     18  


There is a minor issue with this approach though. It broke a test case.
Look at the last row, since 2000 is a leap year, but 1900 is not a leap
year this might not work universally. Barbara does not want to change
the date, just the year. Agreed, it will work for Barbara 's test case if
the rows are only have a value of 2099.

select crdate, add_months(crdate, -1200) from mytabdate

RSHAMSUD@(protected):ent4pdb1r > /

CRDATE ADD_MONTHS(CRDATE,-1
-- ---- ---- ---- -- -- ---- ---- ---- --
16-SEP-2099 00:00:00 16-SEP-1999 00:00:00
08-OCT-2099 00:00:00 08-OCT-1999 00:00:00
28-FEB-2099 00:00:00 28-FEB-1999 00:00:00
29-FEB-2000 00:00:00 28-FEB-1900 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 Khedr, Waleed
Sent: Tuesday, March 23, 2004 3:12 PM
To: oracle-l@(protected)
Subject: RE: update year in date column


It 's 100 years equals 1200 months.
Use add_month( <column >, -1200)

Waleed

-- --Original Message-- --
From: Barbara Baker [mailto:barbarabbaker@(protected)]
Sent: Tuesday, March 23, 2004 3:01 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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