使用SSIS将数据从Excel导入到SQL Server表

Question

I have created a basic package using excel as source and sql server database as destination. I have inserted 5 rows in excel and they are getting populated in sql server table without any error. when i add 2 new rows to the excel file, i want only those two newly added rows to be added in the database table , without previous rows being populated again.

Can someone please help me with this?

Answer 1

You can try left joining the excel source with the sql table and then filtering out any rows that already have a match:

Notes:

• Excel Source is your Excel Data
• Sort is there because your data always needs to be sorted on your join keys when using a Merge Join
• OLE DB Source is your SQL table with existing Excel data in it. I have an ORDER BY in my query and the IsSorted property set to TRUE so the data is already sorted coming in.
• The Merge Join is peforming a left outer join.
• The conditional Split is splitting on a condition that says ISNULL(name_of_field_from_ole_db_source)
• The OLE DB Destination writes out to SQL (same table as being used in the OLE DB Source node).