Consider the relation prereg in the University Database and its transitive closure defined in Section 5.4of the textbook. Consider the recursive query in Figure 5.16 that outputs this transitive closure. Write arecursive query that finds all direct or indirect prerequisite of BIO-301. Output a table with one columnthat contains the IDs of all such prerequisites. Note that your query must work correctly not only for thegiven instance of prereg, but also for all possible instances. Run this query.

Recursion: Recursive views make it possible to write queries , such as transitive closure queries,…

Answered: Consider the recursive query in Figure…

Consider the recursive query in Figure 5.16 that outputs this transitive closure. Write a that finds all direct or indirect prerequisite of BIO-301. Output a table with one column

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Consider the relation prereg in the University Database and its transitive closure defined in Section 5.4
of the textbook. Consider the recursive query in Figure 5.16 that outputs this transitive closure. Write a
recursive query that finds all direct or indirect prerequisite of BIO-301. Output a table with one column
that contains the IDs of all such prerequisites. Note that your query must work correctly not only for the
given instance of prereg, but also for all possible instances. Run this query.

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