02-03-2012
eliminate duplicate rows - sqlloader
Hi ,
I have a data file in this format.
I am using a sqlloader script to load the data into the database table.There is a unique constraint on the columns p1 and p2.
So, sqlldr cannot load both the records. This eliminates duplicate records from being loaded into the DB table.
But the issue is when i load the data into the database table.
I want to be able to load the first row from the data file into the DB table as it has a value in p3 column.
I want sqlldr to reject the second row.
The database that I am working on is Oracle 11g.
Can you please let me know how can I do that ?
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LEARN ABOUT CENTOS
drop_table
DROP
TABLE(7) PostgreSQL 9.2.7 Documentation DROP TABLE(7)
NAME
DROP_TABLE - remove a table
SYNOPSIS
DROP TABLE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
DESCRIPTION
DROP TABLE removes tables from the database. Only the table owner, the schema owner, and superuser can drop a table. To empty a table of
rows without destroying the table, use DELETE(7) or TRUNCATE(7).
DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. However, to drop a table that is
referenced by a view or a foreign-key constraint of another table, CASCADE must be specified. (CASCADE will remove a dependent view
entirely, but in the foreign-key case it will only remove the foreign-key constraint, not the other table entirely.)
PARAMETERS
IF EXISTS
Do not throw an error if the table does not exist. A notice is issued in this case.
name
The name (optionally schema-qualified) of the table to drop.
CASCADE
Automatically drop objects that depend on the table (such as views).
RESTRICT
Refuse to drop the table if any objects depend on it. This is the default.
EXAMPLES
To destroy two tables, films and distributors:
DROP TABLE films, distributors;
COMPATIBILITY
This command conforms to the SQL standard, except that the standard only allows one table to be dropped per command, and apart from the IF
EXISTS option, which is a PostgreSQL extension.
SEE ALSO
ALTER TABLE (ALTER_TABLE(7)), CREATE TABLE (CREATE_TABLE(7))
PostgreSQL 9.2.7 2014-02-17 DROP TABLE(7)