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)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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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.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F93423dcf-8fa5-41fe-8782-938bb8d00d1a%2Faced5031-582e-48d6-8226-f882a32ed9f4%2F31jgsd_processed.png&w=3840&q=75)
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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