Alexander Ordonez wrote:
>
> Hi gurus,
> I need detect and delete duplicate rows in any table, somebody helpme
> thanks!!!
>
> @lex
> ------------------------------------------------------------
> Lic. Alexander Ordóñez Arroyo
> Caja Costarricense del Seguro Social
> Soporte Técnico - División de Informática
> Telefono: 295-2004, San José, Costa Rica
> [EMAIL PROTECTED] Icq# 30173325
>
> ------------------------------------------------------------
Check the EXCEPTIONS clause of the ALTER TABLE ... ADD CONSTRAINT
command. Create an EXCEPTIONS table, create a unique constraint on the
columns which *should* be unique, then proceed as follows :
create table nodup
as select distinct * from <my_table>
where rowid in (select row_id from exceptions
where table_name = upper('<my_table>');
(I dislike distinct but sometimes ... :-))
delete <my_table>
where rowid in (select row_id from exceptions
where table_name = upper('<my_table>');
insert into <my_table>
select * from nodup;
drop table nodup;
truncate table exceptions;
and go on with the next table. Write a script which takes a parameter
for all this part, no need to retype it each time.
--
Regards,
Stephane Faroult
Oriole Ltd
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Author: Stephane Faroult
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