Which results would show if the employee table LEFT JOINed thecustomer table?All rows from the customer table even if they don't have an employeesupporting themO All employees, even those that aren't supporting customersOnly customers that have employees associated with them and vice-versaO Only employees that have customers that they support

Answered: Which results would show if the…

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

Which results would show if the employee table LEFT JOINed the
customer table?
All rows from the customer table even if they don't have an employee
supporting them
O All employees, even those that aren't supporting customers
Only customers that have employees associated with them and vice-
versa
O Only employees that have customers that they support

Expert Solution

Step 1

Left join :

All the records from the left table and the matched data from the right tables are essentially returned by the SQL Left Join. Let's imagine, for illustration purposes, that we have tables A and B. Each record from Table A and only the matched records from Table B will be shown when the Left Join operation is performed on these two tables.

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