E D1071 Pages: 4

same names. Show an initial query tree for the following query and optimize it using
the rules ofheuristics. Assume that TITLE is a candidate key of COURSE.

SELECT NAME, TITLE, SEMESTER YEAR

FROM INSTRUCTOR, COURSE, TEACHES

WHERE COURSE.COURSE-ID=TEACHES.COURSE-ID AND

TEACHES.ID = INSTRUCTOR.ID AND INSTRUCTOR.DEPT ="MATHS’

AND TEACHES.DEPT = INSTRUCTOR. DEPT

20 a) Write ashort note on Big Data. (4)
b) What is a semantic web technology? How is it relevance? (3)
c) How does RDF support semantic web technology? (3)

بد بد ‎ಸಸ್ಯ‏

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