Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Chapter 13, Problem 9E
Explanation of Solution
a.
The stored offset and length of field:
- The null values are used to indicate that the value is not present in the current location.
- The null values can be indicated by a space or zero or any other default value...
Explanation of Solution
b.
Modification of records:
- It should be able to locate the null bitmap and the offset and length values of non-null attributes using the null bitmap.
- This can be done by storing the null bitmap at the beginning and then for non-null at...
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