1. Consider the relational schema part (part_id, name, cost) subpart (part_id, subpart_id, count) A tuple (P1, P2, 3) in the subpart relation denotes that the part with part_id P2 is a direct subpart of the part with part_id P1, and P1 has 3 copies of P2. Note that P2 may itself have further subparts. Write a recursive SQL query that outputs the names of all subparts of the part with part_id "P-100".

1. Consider the relational schema part (part_id, name, cost) subpart (part_id, subpart_id, count) A tuple (P1, P2, 3) in the subpart relation denotes that the part with part_id P2 is a direct subpart of the part with part_id P1, and P1 has 3 copies of P2. Note that P2 may itself have further subparts. Write a recursive SQL query that outputs the names of all subparts of the part with part_id "P-100".

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

100%

1.
Consider the relational schema
part (part_id, name, cost)
subpart (part_id, subpart_id, count)
A tuple (P1, P2, 3) in the subpart relation denotes that the part with part_id P2 is a
direct subpart of the part with part_id P1, and P1 has 3 copies of P2. Note that P2
may itself have further subparts. Write a recursive SQL query that outputs the names
of all subparts of the part with part_id "P-100".

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