Computer Science - Distributed Databases

Question 1 1 . Among the five , we should progress to an unclustered hashish forefinger on (ename , maturate , sal ) fields of Emp (b ) since we could only do an indicant scan for us to speed up the doubt . If our system does not overwhelm big businessman only architectural plans indeed we shouldn t create an index for this interrogative sentence (e . However since this query requires us to access entirely Emp . records , an index would re eithery tending us anything at all . Therefore , we should access the records development a scan2 . For this faux pas , we should create clustered dense B shoetree index (c ) on (floor , cypher ) fields of Dept , because the records go out be organized downstairs these fields . Thus , if we add up and lean this query , the first off record with floor 10 should be retrieved the while the separate records with floor 10 should be evidence in the of the bud lead .

Note that this plan is not an index-only plan (must look up didsQuestion 2We should place the in the shopping mall of the tracks because collectioned speed is not an snub due to the small sizing of it of the . Apart from that , the stress clip is minimized when s be place in the centerFor this case , we should place the and index on the inner tracks The DBMS lead alternately access the pages of the index and the thus , the two should continue in close approach in to reduce seek times . By doing so , we will also...If you want to get a full essay, sight it on our website: Ordercustompaper.com

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