DataBase System Relational database E A Relational database consists of multiple relations E Information about an enterprise is broken up into parts, with each relation storing one part of the information G Example customer_id I customer_ namel customer street customer cit 19283-7465J ohnson 12 Alma st Palo alto 677-89-9011 Hayes 3 Main st H arrison 182-73-6091 Turner 123 Putnam Ave. Stamford 321-12-3123 Jones 100 Main St Harrison 336-66-9999 Lindsay 175 Park Ave Pittsfield 019-28-3746 Smith 72 North st R ve (a) The customer table The customer table stores information about customers Haichang Gao, Software School, Xidian UniversityDataBase System Haichang Gao , Software School , Xidian University 9 Relational Database  A Relational database consists of multiple relations  Information about an enterprise is broken up into parts, with each relation storing one part of the information  Example: The customer table stores information about customers