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Consider following global schema of an company database who keep track of companys employees, department and projects.

written 6.3 years ago by

teamques10 ★ 64k

modified 2.0 years ago by

sagarkolekar ★ 11k

Consider following global schema of an company database who keep track of company’s employees, department and projects.

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a) Perform primary Horizontal fragmentation(PHF) of relation PROJ with pname and budget of projects given their number issued at three sites and access project information according to budget one site accesses <= 200000 other accesses> 200000

b) Explain how the above resulting PHF fulfill the correctness rules of fragmentation.

c) Perform Derived Horizontal Fragmentation (DHF) of relation EMP with respect to ‘PAY’ (p1:sal>30000 and p2:sal<= 30000)

d) Explain how the above resulting DHF fulfill the correctness rules of fragmentation.

distributed databases

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