Corporation: id 15 17 20 Company: cid id 1 15 17 15 20 15 2 3 4 5 Assumptions: •id in Company references id in Corporation. • cid in Department references cid in Company Department: did cid 1 1 2 2 3 2 4 5 6 7 8 3 9 1 10 2 11 4 12 5 3 5 1 3 Each option starts from the original tables (given above) NOT from the tables modified by the previous option You don't need to copy the entire table. Just explain the action of each operation. (a) Suppose that all the foreign keys are declared using on delete restrict. What is the effect of the instruction delete from Company where cid=2? (b) Suppose that all the foreign keys are declared using on delete cascade. What is the effect of the instruction delete from Corporation where id-15?

Corporation: id 15 17 20 Company: cid id 1 15 17 15 20 15 2 3 4 5 Assumptions: •id in Company references id in Corporation. • cid in Department references cid in Company Department: did cid 1 1 2 2 3 2 4 5 6 7 8 3 9 1 10 2 11 4 12 5 3 5 1 3 Each option starts from the original tables (given above) NOT from the tables modified by the previous option You don't need to copy the entire table. Just explain the action of each operation. (a) Suppose that all the foreign keys are declared using on delete restrict. What is the effect of the instruction delete from Company where cid=2? (b) Suppose that all the foreign keys are declared using on delete cascade. What is the effect of the instruction delete from Corporation where id-15?

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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