Database System Concepts
7th Edition
ISBN: 9789332901384
Author: Henry F. Korth & S. Sudarshan Abraham Silberschatz
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Question
Chapter 14, Problem 3PE
a)
Program Plan Intro
B+ -tree:
- In this case, initially it is considered that the B+-tree is empty and the values are inserted in ascending order.
- It is not possible to have a value less that n/2 as the non-root node and in this case the non-root node can only have 2-3 key values.
- The first two key values (2,3) get added to the root node.
b)
Explanation of Solution
- Next, when key value 7 is inserted in the tree;
- Root node now holds key value 7, and its first pointer points to a leaf node.
- The inserted leaf node contains the key value 2,3, and 5.
- As more key values are inserted, more leaf nodes are added as per requirement...
- Root node now holds key value 7, and its first pointer points to a leaf node.
- The inserted leaf node contains the key value 2,3, and 5.
c)
Explanation of Solution
- The first four key values (2,3,5, and 7) are simply added to the root node.
- Next, when key value 11 is inserted in the tree;
- Root node now holds the key value 11, and its first pointer points to a leaf node.
- The inserted leaf node contains the key values 2,3,5, and 7...
- Root node now holds the key value 11, and its first pointer points to a leaf node.
- The inserted leaf node contains the key values 2,3,5, and 7...
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