EBK DATABASE SYSTEM CONCEPTS
7th Edition
ISBN: 9781260049268
Author: SILBERSCHATZ
Publisher: MCG COURSE
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Chapter 5, Problem 21E
Explanation of Solution
Modified recursive query:
The given recursive query has to be modified so that the depth attribute denotes the level of intermediate prerequisites which are between the course and the prerequisite.
The modified query is as follows:
with recursive prereq_depth(course_id, prereq_id, depth) as
(select course_id, prereq_id, 0
...
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EBK DATABASE SYSTEM CONCEPTS
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