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welcome to this the seventh of eight videos on database design my names Andy wicks and in this video were going to be looking at this final stage of adding the fields so far weve found the objects in the secondhand bookshop example weve made the links between the objects weve made sure that all links are one-to-many and weve seen how to add both primary keys and foreign keys now were going to add the fields we left the last video with this design we had the object at the top and below are the tables that were going to create from those objects wed added the primary keys and the foreign keys now its just a matter of going through each table and seeing which other pieces of information wed like to have so lets look at the author table well there were going to have the for name and surname of the author thats fairly standard next the author title were not going to add any more fields thats an intersection entity one of these special objects that is only there to make sure