what is the result of a LEFT join on customer id? SELECT Customers, Sales FROM Customers AS C LEFT JOIN Sales AS S ON C.id = s.customer_ID

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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what is the result of a LEFT join on customer id?
SELECT Customers, Sales
FROM Customers AS C
LEFT JOIN Sales AS S
ON C.id = s.customer_ID 
 
Customers Table
ID
Sales Table
ID
First Name
1 Daniel
2 Erik
3 Diana
4 Anna
5 Chris
1
2
3
Date
9/2/19
10/1/19
10/1/19
Last Name
Blac
Brown
Trump
Yao
Sanders
Book ID
2
1
3
Gender
M
M
F
F
M
Customer_ID
3
2
4
Age
Quantity
34
25
39
19
42
1
1
1
Customer_Since
Amount
10/13/14
6/10/15
10/25/15
2/20/17
1/31/18
14.99
12.99
15.75
Transcribed Image Text:Customers Table ID Sales Table ID First Name 1 Daniel 2 Erik 3 Diana 4 Anna 5 Chris 1 2 3 Date 9/2/19 10/1/19 10/1/19 Last Name Blac Brown Trump Yao Sanders Book ID 2 1 3 Gender M M F F M Customer_ID 3 2 4 Age Quantity 34 25 39 19 42 1 1 1 Customer_Since Amount 10/13/14 6/10/15 10/25/15 2/20/17 1/31/18 14.99 12.99 15.75
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