Computers and Technology, 12.08.2020 08:01 harleycrider2251
Design a database system to support any number of schools in an area (e. g. School District, Town, or City). The entities should include, Attendance, Classes, Parents, Schools, Students, and Teachers.
1. Write the business rule(s) that govern the relationship between the entities.
2. Given the business rule(s) you wrote in Step 1, create a Crow's Foot ERD. Do not use your free hand to create the ERD.
3. Determine the characteristics of each entity (Attributes).
A teacher can teach a class, and each class is taught by one teacher. So, the teacher can have a One-to-Many (1:M) relationship with the class.
-A student can enroll in many classes, and each class is enrolled by many students.
So, the students have a Many-to-Many (M:N) relationship with classes.
-A student can make attendance, and each attendance is made by each student.
So, the student have a One-to-One (1:1) relationship with the attendance.
-A teacher can check attendances, and attendances are checked by teachers.
So, the teachers have Many-to-Many (M:N) relationship with the attendances.
-A student can attend school, and the school is attended by many students.
So, the student have a One-to-One (1:1) relationship with the school.
-Parents meet with the teacher, and the teacher is met by parents.
So, the teacher has a One-to-Many (1:M) relationship with the students.
-A student has parents. So, the student has a One-to-Many (1:M) relationship with the parents.
-A school can contain classes, and classes are contained in each school. So, the school has a One-to-One (1:1) relationship with the school.
Answers: 3
Computers and Technology, 22.06.2019 10:10
3. bob is arguing that if you use output feedback (ofb) mode twice in a row to encrypt a long message, m, using the same key each time, it will be more secure. explain why bob is wrong, no matter what encryption algorithm he is using for block encryption (15 points).
Answers: 3
Computers and Technology, 22.06.2019 12:40
In a response of approximately 50 words, explain why it would be essential for the successful a/v technician to participate in additional coursework, presentations and seminars offered by equipment manufacturers as well as annual conferences attended by colleagues in the industry.
Answers: 1
Computers and Technology, 25.06.2019 03:30
What best describes the purpose of occupational safety and health administration
Answers: 1
Computers and Technology, 25.06.2019 11:30
In a personal computer, the system software
Answers: 1
Design a database system to support any number of schools in an area (e. g. School District, Town, o...
History, 05.05.2020 03:00
English, 05.05.2020 03:00
Chemistry, 05.05.2020 03:00
Mathematics, 05.05.2020 03:00
History, 05.05.2020 03:00
Physics, 05.05.2020 03:00
History, 05.05.2020 03:00
Mathematics, 05.05.2020 03:00
Social Studies, 05.05.2020 03:00
Mathematics, 05.05.2020 03:00
Mathematics, 05.05.2020 03:00
Mathematics, 05.05.2020 03:00