Getting duplicate records while storing into the data base oracle 11g

Question

My program will read the data from the CSV file and insert each and every record into the data base. But the problem is, if there are 200 records, while retrieving it, it is showing 212 records containing some of the duplicate records. How to solve this?

Answer 1

Add a primary key to you table to ensure no duplicate records can be inserted. Else you can also go for Merge statement to avoid duplicates.

Example for Merge:

http://www.oracle-base.com/articles/9i/merge-statement.php