How to avoid primary key violation error while inserting the data to destination tables using ssis package? how can we eliminate duplicate records and insert only the unique records into destination table?
There are 2 ways you could end up with trying to insert a duplicate. First, you're trying to insert data for which the PK is already in the table. My preferred way to avoid that possibility is to use a Lookup transform in the dataflow to check if the PK values I'm about to attempt to insert already exist. Using the Lookup transform, you can divert those that already exist down a different path. The second way you might end up with a duplicate PK i if you have duplicate(s) in the data you are trying to import. The Sort transform can be used to remove duplicates from your imported data. There's still a possibility that duplicates could still be in your import data. When all else fails, you can use the Error output from your connection manager to capture the rows that fail.