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Part Design a database for an Access Control System. The purpose of the system is to control who has access to which doors at what time. There are six entities in this database: Users ● Groups o A user can be assigned to more than one group. • Doors • AccessRules o Decides which Group has access to which Door at which TimeSchedule. o Example: Group A can access the Front Door on Monday from 7am to 9pm. Example: Group B can access the Back Door on Saturday from 8am to 10pm

Part Design a database for an Access Control System. The purpose of the system is to control who has access to which doors at what time. There are six entities in this database: Users ● Groups o A user can be assigned to more than one group. • Doors • AccessRules o Decides which Group has access to which Door at which TimeSchedule. o Example: Group A can access the Front Door on Monday from 7am to 9pm. Example: Group B can access the Back Door on Saturday from 8am to 10pm

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Part Design a database for an Access Control System. The purpose of the system is to control who has access to which doors at what time. There are six entities in this database: ● ● Users Groups O A user can be assigned to more than one group. Doors AccessRules O Decides which Group has access to which Door at which TimeSchedule. Example: Group A can access the Front Door on Monday from 7am to 9pm. o o Example: Group B can access the Back Door on Saturday from 8am to 10pm. TimeSchedules To make it simple, we only need to pport Weekly Schedules. The TimeSchedules table has the following columns: Id O O DayOfWeek StartTime ■ EndTime o Example: a schedule with DayOfWeek-Monday, StartTime=7:00, EndTime=23:00 means this schedule grants access on Monday from 7am to 11pm. Entrance Logs O This table keeps a permanent record of which user accessed which door at what time. o The logs must remain valid even after the related records have been updated. For example, after user X is deleted, the admin should still be able to know who (the name of the user) accessed which door (name of the door, which may also change). 1. Design a conceptual schema. The schema should only contain the six entities listed above. Your job is to design the relationships between them. 2.. Convert the schema you designed in (1) to a relational schema. Hint: additional middle table needs to be added for each M:N relationship in your conceptual schema. Notes: When drawing the diagram, please follow the notation style in Course Project 1 Solution.
Transcribed Image Text:Part Design a database for an Access Control System. The purpose of the system is to control who has access to which doors at what time. There are six entities in this database: ● ● Users Groups O A user can be assigned to more than one group. Doors AccessRules O Decides which Group has access to which Door at which TimeSchedule. Example: Group A can access the Front Door on Monday from 7am to 9pm. o o Example: Group B can access the Back Door on Saturday from 8am to 10pm. TimeSchedules To make it simple, we only need to pport Weekly Schedules. The TimeSchedules table has the following columns: Id O O DayOfWeek StartTime ■ EndTime o Example: a schedule with DayOfWeek-Monday, StartTime=7:00, EndTime=23:00 means this schedule grants access on Monday from 7am to 11pm. Entrance Logs O This table keeps a permanent record of which user accessed which door at what time. o The logs must remain valid even after the related records have been updated. For example, after user X is deleted, the admin should still be able to know who (the name of the user) accessed which door (name of the door, which may also change). 1. Design a conceptual schema. The schema should only contain the six entities listed above. Your job is to design the relationships between them. 2.. Convert the schema you designed in (1) to a relational schema. Hint: additional middle table needs to be added for each M:N relationship in your conceptual schema. Notes: When drawing the diagram, please follow the notation style in Course Project 1 Solution.
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