Database Systems: Design, Implementation, Management, Loose-leaf Version
12th Edition
ISBN: 9781305866799
Author: Coronel, Carlos; Morris, Steven
Publisher: Course Technology
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Chapter 12, Problem 1RQ
Explanation of Solution
Evolution from centralized
During the year 1970s, the centralized DBMS was implemented and the use of centralized DBMS stores the corporate data in single central site and providing the data access to dumb the terminals.
It worked well to fill the corporations structured information requirements, but it little drop at time of rapidly moving events needs quicker reply times and similarly rapid access to information.
At this time, the distributed database design is started with impact of internet. The success of internet and mobile technologies will increase use of the distributed database.
- The database management system supports the database distributed over the numerous different sites.
- Distributed DBMS manages the storage and processing of logically associated data across the connected systems wherein both “data” and “processing functions” are distributed between various sites.
In any case, distributed database are possible to identify the development of future database, mostly for particular mobile applications. This is specially needed because centralized database management is subject to such as high costs, reliability issues, scalability issues, performance degradation, and organization rigidity.
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2. Consider the following pseudocode for partition:
function partition (A,L,R)
pivotkey = A [R]
t = L
for i
L to R-1 inclusive:
if A[i] A[i]
t = t + 1
end if
end for
A [t] A[R]
return t
end function
Suppose we call partition (A,0,5) on A=[10,1,9,2,8,5]. Show the state of the list at the
indicated instances.
Initial A
After i=0 ends
After 1 ends
After i 2 ends
After i = 3 ends
After i = 4 ends
After final swap
10 19 285
[12 pts]
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If we assign each square in our sudoku to a variable like so:
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Chapter 12 Solutions
Database Systems: Design, Implementation, Management, Loose-leaf Version
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