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update year in date column

Barbara Baker

2004-03-23

Replies:

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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