The enity is the tables. Attribute are the fields in the table and the information that is in that table are called the attribute types. A record makes up a row in the table of information. The database tables are each entity in the dadtabse so here it is the customer, invoice and product that will be in the database. And then the relatiosnhips that are here is the customer and the product come together as the invoice and they make up the keys for each and then the quantity the customer is getting.
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