Computer Science - Distributed Databases

Question 1 1 . Among the five , we should create an unclustered hash forefinger finger on (ename , age , sal ) fields of Emp (b ) since we could single do an index scan for us to speed up the inquiry . If our system does not include index only when pictures whence we shouldn t create an index for this wonder (e . However since this query requires us to entree all Emp . records , an index would really answer us anything at all . Therefore , we should access the records employ a scan2 . For this case , we should create clustered dense B tree index (c ) on (floor , budget ) fields of Dept , because the records go away be organized under these fields . Thus , if we keep company and fill this query , the first record with floor 10 should be retrieved the while the other records with floor 10 should be study in the of the budget . Note that this plan is not an index-only plan (must look up didsQuestion 2We should place the in the pump of the tracks because sequential speed is not an issue due to the down(p) size of it of the . Apart from that , the seek time is minimized when s ar 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 reside in finish proximity in to reduce seek times . By doing so , we will also...If you want to get a adequate essay, secernate it on our website: BestEssayCheap.com

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