I keep messing up 1NF

Question

For me the most understandable description of going about 1NF so far I found is ‘A primary key is a column (or group of columns) that uniquely identifies each row. ‘ on www.phlo

Answer 1

The strengths of relational databases come from separating information into different tables. One useful way of looking at tables is first to identify as entity tables those concepts which are relatively permanent (in your case, probably Pizza, Customer, Topping, Deliveryguy). Then you think about the relations between them (in your case, Order, Delivery ). The relational tables link together the entity tables by having foreign keys pointing to the relevant entities: an Order has foreign keys to Customer, Pizza, Topping); a Delivery has foreign keys to Deliveryguy and Order. And, yes, relations can link relations, not just entities.

Only in such a context can you achieve anything like normalization. Tossing a bunch of attributes into one singular table does not make your database relational in any meaningful sense.