Maurice Tutor

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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 17 Sep 2017 My Price 6.00

combinations of weekdays

Consider an entity type SECTION in a UNIVERSITY database, which describes the section offerings of courses. The attributes of SECTION are: Section Number, Semester, Year, Course Number, Instructor, Room No (where section is taught), Building (where section is taught), Weekdays (domain is the possible combinations of weekdays in which a section can be offered {MWF, MW, TT, etc.}), and Hours (domain is all possible time periods during which sections are offered {9–9.50 A.M., 10–10.50 A.M., . . ., 3.30–4.50 P.M., 5.30–6.20 P.M., etc.}). Assume that Section Number is unique for each course within a particular semester/year combination (that is, if a course is offered multiple times during a particular semester, its section offerings are numbered 1, 2, 3, etc.). There are several composite keys for SECTION, and some attributes are components of more than one key. Identify three composite keys, and show how they can be represented in an ER schema diagram.

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Maurice Tutor
(5)
Status NEW Posted 17 Sep 2017 09:09 PM My Price 6.00

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