| load data - load the latest column for given dates... [message #71976] |
Wed, 12 February 2003 11:21  |
Sabrina
Messages: 76
Registered: February 2002
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Member |
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Hi,
my table looks like,
SQL> desc proc_codes_hist;
Name Null? Type
------------------------------- -------- ----
PROC_CD VARCHAR2(5)
BASIC_UNIT_TO_DATE1 VARCHAR2(6)
My control file looks like,
load data infile 'EDS1997.TXT'
into table PROC_CODES_HIST append
(
PROC_CD POSITION(1-5),
BASIC_UNIT_FROM_DATE1 POSITION(6-11)
)
Right now, there are multiple PROC_CD's for multiple BASIC_UNIT_FROM_DATE1 dates.
What i want to do is,
While loading data, i only want to load the PROC_CD for the most current BASIC_UNIT_FROM_DATE1 date. How do i do it?
Where do i write my logic?
Any suggestions will be very appreciated.
Thank you!
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| Re: load data - load the latest column for given dates... [message #71980 is a reply to message #71976] |
Thu, 13 February 2003 01:06  |
 |
Barbara Boehmer
Messages: 9094
Registered: November 2002
Location: California, USA
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Senior Member |
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I don't think SQL*Loader can do what you want. I believe you have to load all of the data, then delete all but the most current, after loading:
DELETE FROM proc_codes_hist
WHERE (proc_cd, basic_unit_from_date1)
NOT IN (SELECT proc_cd, MAX (basic_unit_from_date1)
FROM proc_codes_hist
GROUP BY proc_cd);
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