Novice User Application 1 Data DBMS Novice User Application 2 Novice User Application 3 DB User

Payroll Clerk Payroll Data DBMS General Ledger AP Clerk Business Manager General Ledger AP Clerk Accounts Payable IT Department

Users perception of the data User 1 view User 3 view User 2 view Conceptual Schema Users perception of the data Internal Schema How is data stored Data Data Data

Database Table 2 Control Table 1 Master Table 3 Transaction

Database Table 2 Schema States (Abbreviation, Description) Table 2 Control Table 1 Schema Person (Id, Last, First, Middle, State, DOB) Table 3 Schema Classes(Id, Subject, Number, Grade) Table 1 Master Table 3 Transaction

Database State Control Student Master Course Transaction 123456 Molly Smith Jane VA 10/04/1995 2364598 Taylor Jones R MD 09/30/1994 55684 Mark Twain E NJ 10/25/1992

Database - terms State Control Course Transaction VA Virginia MD Maryland NJ New Jersy 123456 CS 474 A WRTC 250 B+ 55684 139 123456 Molly Smith Jane VA 10/04/1995 2364598 Taylor Jones R MD 09/30/1994 55684 Mark Twain E NJ 10/25/1992 Student Master

Database - terms State Control Course Transaction VA Virginia MD Maryland NJ New Jersy 123456 CS 474 A WRTC 250 B+ 55684 139 123456 Molly Smith Jane VA 10/04/1995 2364598 Taylor Jones R MD 09/30/1994 55684 Mark Twain E NJ 10/25/1992 Student Master