Draw an entity-relationship diagram for the following scenario,
==============
stating any assumptions you find it necessary to make,
==================
and showing unknown cardinalities and optionalities using question marks on the relationship line.
It is required to keep the following information on students,
courses and subcourses. Each student has a name,
It is required to keep the following information on students,
courses and subcourses. Each student has a name,
identification number,
home address,
term address,
and a number of qualifications
for which the subject (e.g. maths), grade (e.g. C) and level (e.g. `A' level) are recorded. Each student is registered for one course where each course has a name (e.g. Information Systems) and an identification number. Record is kept of the number of students registered for each course.
Draw an entity-relationship diagram for the following scenario,==============stating any assumptions you find it necessary to make,==================and showing unknown cardinalities and optionalities using question marks on the relationship line.It is required to keep the following information on students, courses and subcourses. Each student has a name,It is required to keep the following information on students, courses and subcourses. Each student has a name, identification number, home address, term address, and a number of qualifications for which the subject (e.g. maths), grade (e.g. C) and level (e.g. `A' level) are recorded. Each student is registered for one course where each course has a name (e.g. Information Systems) and an identification number. Record is kept of the number of students registered for each course.
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