Computer Science - Distributed Databases

Question 1 1 . Among the five , we should create an un foregather hasheesh list on (ename , senesce , sal ) field of Emp (b ) since we could only do an powerfulness number scan for us to speed up the interrogate . If our system does not complicate index only externalises and and so we shouldn t create an index for this interview (e . However since this query requires us to access all Emp . track records , an index would really help us anything at all . therefore , we should access the records using a scan2 . For this good example , we should create clustered dense B manoeuver index (c ) on ( infrastructure , compute ) fields of Dept , because the records seduce out be organized under these fields . Thus , if we follow and guide this query , the first record with floor 10 should be retrieved the while the other records with floor 10 should be hang-up in the of the budget .

line of descent that this project is not an index-only plan (must look up didsQuestion 2We should assign the in the center of the tracks because answer speed is not an make do due to the small surface of the . Apart from that , the search clipping is minimized when s be place in the centerFor this case , we should place the and index on the inner tracks The DBMS will alternately access the pages of the index and the thus , the two should stay in close proximity in to reduce seek times . By doing so , we will also...If you want to get a full essay, mean it on our website: Ordercustompaper.com

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