I have a large (1.2GB) database of ship data. Each record has fields such as date, part number, product category, quantity and so on for 20 fields. I want to normalize this database to save space and enforce integrity. However, I get new data once a month in a large Excel spreadsheet. My problem is I can not understand how I add big chunks of new data to the tables of a normalized database. It's the concept of doing this that escapes me. Can anyone tell me if this is even possible and, if so, how? Thanks in advance.