Comments for Unleash the Power of Knowledge http://kamaltechworld.wordpress.com Technology Explored for TrainedMinds Tue, 03 Jun 2008 06:35:21 +0000 http://wordpress.com/ hourly 1 Comment on About by karthikayan,saravana http://kamaltechworld.wordpress.com/about-me/#comment-10 karthikayan,saravana Tue, 03 Jun 2008 06:35:21 +0000 #comment-10 kamal the great man in the great world kamal the great man in the great world

]]> Comment on Oracle – Finding Duplicates in a Table – Part I by mendus http://kamaltechworld.wordpress.com/2008/04/23/oracle-finding-duplicates-in-a-table-part-i/#comment-9 mendus Thu, 24 Apr 2008 03:18:14 +0000 http://kamaltechworld.wordpress.com/?p=9#comment-9 When large volumes of data needs to be loaded, usually for performance reasons existing constraints such as unique, pk and fk cons will be disabled and data load will be performed in direct path using sqlldr. In this case any violations can be found using following syntax, which includes duplicates as you mentioned in your post ALTER TABLE employees ENABLE CONSTRAINT employee_pk EXCEPTIONS INTO exceptions; Also the other way you can find dups with our using any constaints is as follows select key_column, count(*) number_of_dups from table_name group by key_column having count(*) > 1; - Mendus <a href='http://oracle-error.blogspot.com' rel="nofollow">Oracle Error</a> When large volumes of data needs to be loaded, usually for performance reasons existing constraints
such as unique, pk and fk cons will be disabled and data load will be performed in direct path using sqlldr.

In this case any violations can be found using following syntax, which includes duplicates as you mentioned in your post

ALTER TABLE employees ENABLE CONSTRAINT employee_pk EXCEPTIONS INTO exceptions;

Also the other way you can find dups with our using any constaints is as follows

select key_column, count(*) number_of_dups
from table_name
group by key_column
having count(*) > 1;

- Mendus
Oracle Error

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