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Draw an EER diagram that captures the "is-a" hierarchy of students in another simple database. The database captures both the "basic" information (say, student ID and student name) and "additional" information about undergraduate students. A student may enrol in the BCSc degree program, the co-op program, or both (e.g., a BCSc student is-a student). For the BCSc student, the database records the year in which he is in (e.g., Year3, Year4) as "additional" information. Each co-op student can further be categorized into Canadian or international students. For the former, the database records his SIN; for the latter, the database records his work permit information (passport number and its issuing country, as well as the work permit number). Hint: Make sure you clearly identify the (disjoint vs. overlapping, total vs. partial) constraints.
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Define the Two Phase Locking Protocol This is a protocol that is used to make sure serializability of transactions. This protocol needs that every transaction issue lock and u
Question: In a multi-user database environment, locking mechanisms can be used to solve the three basic problems of concurrency. On the other hand, however, locking may also le
Object-oriented decompositions Object-oriented decompositions of systems better are able to cope with change. Each subsystem has a well-defined interface which communicates with
Although, the essential features of E-R diagrams are enough to design many database situations. Though, with more difficult relations and advanced database applications, it is need
What are the uses of the information in the Data dictionary? The following information is directly taken from the Data dictionary: Information on fields displayed with
State about the Activity Diagram Activity diagrams show flow from one activity to other. It is an ongoing non atomic execution within a state machine. Activity finally results
Explain the cartesian product in Database Management System
Which method of access uses key transformation? A Hash method of access uses key transformation.
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
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