4. Write two queries to list the ID of all the authors that do not have any books. a) Using a join: b) Using a subquery:
4. Write two queries to list the ID of all the authors that do not have any books. a) Using a join: b) Using a subquery:
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

Transcribed Image Text:4. Write two queries to list the ID of all the authors that do not have
any
books.
a) Using a join:
b) Using a subquery:

Transcribed Image Text:mysql> DESC bookauthor;
mysql> DESC author;
mysql> DESC book;
| Field
| Туре
| Field
| Туре
| Field
Тур
| int(11
| varchai
author_order | int(11
royaltyshare | decima:
author_id
isbn
| author_id | int(1:
| ssn
lastname
| firstname | varch:
| phone
| address
| city
| state
| zip
| varch:
| varch:
isbn
var
I name
| type
pub_id
I price
| advance
I ytd_sales
I pubdate
var
var
| varch:
| varch:
| varch:
| varch:
| varch:
| int
dec
| dec
int
mysql> DESC bookeditor;
| dat
| Field
| Туре
mysql> DESC editor;
mysql> DESC publisher;
editor_id | int(11)
| varchar(1
| Field
isbn
| Field
| Туре
editor_id
ssn
pub_id | int(11)
| varchar(40)
varchar(40)
varchar(20)
varchar(2)
lastname
name
firstname
address
| phone
editor_position
salary
| city
state
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