Database conduction in System switching process

Source: Internet
Author: User

[ Learning profile ]
    As the school system was replaced, we needed to import the data from the old database into the new system that we had been working on for a while. [ Learning Content] The concept of independence:
    The school evaluation system or the examination system should involve a few content: students, courses, teachers, administrative classes, virtual classes.
[Executive class]: Classes that are determined by the college's profession do not have much to do with the curriculum. The administrative class is usually fixed, not easy to change.
[Virtual class]: Each class is a virtual class, which includes teachers, courses and students.
presence of contact:
1, the first to the curriculum and the teacher binding, that is, "specialized courses assigned." So the class and the teacher are bound.
2, create a virtual class, this virtual class needs to bind courses and teachers.
3, for virtual classes to add Class students.
    3.1 If the class is an administrative class, the virtual class and the administrative class can be bound, so that the virtual class and the executive class of all students bound.
    3.2 If the class students are not regular, they can only be imported as a unit of students.
[ summary ]deepened understanding of the underlying system.

Database conduction in System switching process

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