how to override exception?

I run a pl/sql script that updates records in a table. In some cases a record that it tries to update to, already exists in the table which causes a unique constraint voilation exception.
What changes can I make to the script whereby whenever a unique constraint is violated, it simply does not update that specific record and move on to the next record and continue with the update as normal?
Would appreciate examples for clarification.
Thhanks.

If you really want to do this, put the update statement in a PL/QSLblock with an exception. You know the errorcode, use it in the OTHERS exception or even better use DUP_VAL_ON_INDEX exception.

You get something like:

BEGIN
UPDATE your_table
SET unique_col = new_val
WHERE condition
EXCEPTION
WHEN OTHERS THEN
IF SQLCODE = -1
THEN
NULL;
ELSE
RAISE;
END IF;
END;

or:

BEGIN
UPDATE your_table
SET unique_col = new_val
WHERE condition
EXCEPTION
WHEN dup_val_on_index THEN
NULL:
END;