Refer to the sample tables and data below.Tables:employees (id(pk), name, job_code(fk))jobs (code (pk), title, salary)mysql> SELECT * FROM employees;| id | name+--|1 | Captain Hook2Tiger Lily3 | Pocahontas4 | Meeko4 rows in set (0.00 sec)mysql> select * from jobs;| codetitle | salary |+-Iauthor | 100.50200.00|editor3 manager 150.00 ||12I job_code3 rows in set (0.00 sec)21 |foreign key references jobs (code)How many rows will the following commands return?(a) SELECT name, salary FROM employees LEFT JOIN jobs ON job_code= code;(b) SELECT name, salary FROM employees RIGHT JOIN jobs ON job_code = code;[Select][Select]

Answer:- 4 rows will appear Output will be:- Explanation:- As, its a left join so, it will take all…

Tables: employees (id(pk), name, job_code(fk)) jobs (code(pk), title, salary) mysql> SELECT * FROM employees; . | id | name | 1 | Captain Hook | 2 | Tiger Lily | 3 | Pocahontas | 4 | Meeko 4 rows in set (0.00 sec) mysql> select from jobs; code title | salary | 1 author | 100.50 2 | editor | 200.00 3 manager | 150.00 3 rows in set (0.00 sec) How many rows will the following commands return? | job_code | foreign key references jobs (code) 21 21 1 | (a) SELECT name, salary FROM employees LEFT JOIN jobs ON job_code - code; (b) SELECT name, salary FROM employees RIGHT JOIN jobs ON job_code = code; [Select] [Select]

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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Concept explainers

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.

Question

Refer to the sample tables and data below.
Tables:
employees (id(pk), name, job_code(fk))
jobs (code (pk), title, salary)
mysql> SELECT * FROM employees;
| id | name
+--
|
1 | Captain Hook
2
Tiger Lily
3 | Pocahontas
4 | Meeko
4 rows in set (0.00 sec)
mysql> select * from jobs;
| code
title | salary |
+-
I
author | 100.50
200.00
|
editor
3 manager 150.00 |
|
1
2
I job_code
3 rows in set (0.00 sec)
2
1 |
foreign key references jobs (code)
How many rows will the following commands return?
(a) SELECT name, salary FROM employees LEFT JOIN jobs ON job_code
= code;
(b) SELECT name, salary FROM employees RIGHT JOIN jobs ON job_code = code;
[Select]
[Select]

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