Refer to the sample tables and sample data below. Then answer questions (a), (b), (c), and (d). Tables: adult (id(pk), name, spouse_id (fk)) -- foreign key (spouse_id) references adult(id) child (id(pk), name) parent_child (parent (pk, fk), child (pk, fk)) foreign key (parent) references adult(id) -- foreign key (child) references child(id)) mysql> SELECT * FROM adult; |id|name | 1 | Homer Simpson 2 Marge Simpson 3 | Fred Flintstone 4 Wilma Flintstone | mysql> SELECT * FROM child; ---- id name **** 11 Bart 12 Lisa 13 Maggie 14 Pebbles 1| 11 21 11 1 12 12 13 i spouse_id i mysql> SELECT * FROM parent_child; I parent child | 21 11 21 3 13 14 14 4 3 | How many times will the names Bart and Homer Simpson appear in the result set from the following command? SELECT c.name, a.name FROM child c 30IN parent_child pc ON c.id pc.child JOIN adult a ON a.id = pc.parent; (a) Bart appears [Select) (b) Homer Simpson appears [Select] ✓times. times.

Refer to the sample tables and sample data below. Then answer questions (a), (b), (c), and (d). Tables: adult (id(pk), name, spouse_id (fk)) -- foreign key (spouse_id) references adult(id) child (id(pk), name) parent_child (parent (pk, fk), child (pk, fk)) foreign key (parent) references adult(id) -- foreign key (child) references child(id)) mysql> SELECT * FROM adult; |id|name | 1 | Homer Simpson 2 Marge Simpson 3 | Fred Flintstone 4 Wilma Flintstone | mysql> SELECT * FROM child; ---- id name **** 11 Bart 12 Lisa 13 Maggie 14 Pebbles 1| 11 21 11 1 12 12 13 i spouse_id i mysql> SELECT * FROM parent_child; I parent child | 21 11 21 3 13 14 14 4 3 | How many times will the names Bart and Homer Simpson appear in the result set from the following command? SELECT c.name, a.name FROM child c 30IN parent_child pc ON c.id pc.child JOIN adult a ON a.id = pc.parent; (a) Bart appears [Select) (b) Homer Simpson appears [Select] ✓times. times.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

How many times will the name Marge Simpson appear in the result set from the following command?
SELECT al.name, a2.name
FROM adult al JOIN adult a2 ON al.id=a2.spouse_id;
(c) Marge Simpson appears [Select]
How many times will the name Wilma Flintstone appear in the result set from the following command?
SELECT a1.name, a2.name
FROM adult al JOIN adult a2 ON al.id = a2.spouse_id
WHERE al.id < a2.id;
times.
(d) Wilma Flintstone appears [Select]
✓times.

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