Transfer all _sales & _customer tables from one magento database to another WITHOUT overwriting.
Hello Magento World,
I have successfully exported from an old magento database all the mg_sales & mg_customer fields to transfer customers and orders over to my new database which has been running for a week and has had a few orders which I don't want to lose.
When I imported these tables (from old database to new) they completely overwritten the existing data.
I had to restore the database back but really need these orders moving over
Any help would be appreciated, I am unfamiliar with SQL so please go gentle.