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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.
What is system log? What are the entries? Ans: The system log that is generally written on stable storage contains the redundant data required to recover from volatile
What are the advantages and disadvantages of merging an association into a class? Advantages: i) Less number of tables ii) Faster performance due to the fewer tables
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What is an ERD?
Define Catalog and meta data ? A catalog is a compilation of records elaborating the contents of a particular collection or group of collections. Metadata (Meta data, or someti
Objectives After reading this part, you should be able to: Modify, create, and delete database schema objects; Update database using SQL command; Retrieve data f
explain equi-join using illustration
Give the Introduction of OBJECT DESIGN Strategies which are selected during system design are carried out in object-oriented design. In this procedure, objects which are identi
Which sorting technique is used to sort databases, whose sizes are very big? Give one such algorithm. Why do sorting techniques like quicksort, insertion sort, etc. not applied
Data Fragmentation "Fragmentation includes decomposing the data in relation to non-overlapping component relations". Why do we require fragmenting a relation?
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