SOLVED CS443 Lab 3

Question 1: Suppose that our database has the following table. Person Con ID Con Name Con Pop Con Size State code State Name State Rgn State Size State Pop Cty Code Cty Name Cty Size Per SSN Per Name Per Age Per DofB Per Add Field Explanation: Con: Stands for Country Pop: Stands for population Rgn: Stands for region (like west, east, central, etc.) Cty: Stands for City Per: Stands for Person DofB: Stands for date of birth Add: Stands for Address It is assumed that - Every country in the world has a different country ID - Every city in the world has a different city code - Every state in the world has a different state code, and - Every person in the world has a different SSN - Every person in the world has only one citizenship and has only one address - Other Assumptions: - There is no village, county, area, etc. A country consists of several states and each state has several cities 1) Based on the above assumptions, what do you choose to be the primary key of Person table? Why? 2) Explain the anomalies exist in the Person table. Choose only one example of insert anomaly, one example of delete anomaly and one example of update anomaly. Note that update does not mean adding or deleting records. It only refers to modifications of values in some rows of the table. 3) Normalize the table; create as many as tables necessary such that all new tables are in third normal form. All the transitive and derived dependencies must be removed.. 4) Draw your ERD based on fully normalized table (Reverse Engineering).