Question: I have a table with rows
duplicated 3 and 4 times each. How can I remove all of
the duplicate rows and only leave one unique row in the
Answer: Deleting multiple duplicate rows is
quite easy in Oracle SQL.
Also see these notes on
delete duplicate rows examples.
If you have a
table with multiple duplicate rows, there are several ways
to remove all of the duplicate rows, thereby making each row
1: Use CTAS: You
can use "create table as select" using a distinct clause.
2: Join the table to itself, using
the MIN clause. This will remove multiple duplicate
Use a subquery to delete multiple duplicate rows.
4. Use the RANK and partition clause where rank > 1
to remove all duplicates.
Use analytic function to remove all duplicate rows.
see these examples on
delete duplicate rows.